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arxiv: 2606.30867 · v1 · pith:5TOCM5EJnew · submitted 2026-06-29 · 🌌 astro-ph.IM · astro-ph.GA· astro-ph.SR

SHARPing accretion and outflows in young stellar objects in star forming regions of the outer Galaxy and beyond

Juan Manuel Alcala' , Alessio Caratti o Garatti , Linda Podio , Mario Giuseppe Guarcello , Loredana Prisinzano , Rosaria Bonito , Paolo Franzetti , Fedor Getman This is my paper

Pith reviewed 2026-07-01 01:21 UTC · model grok-4.3

classification 🌌 astro-ph.IM astro-ph.GAastro-ph.SR
keywords young stellar objectsaccretionoutflowsSHARP instrumentELTlow-metallicity star formationprotoplanetary disksMagellanic Clouds
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The pith

The SHARP instrument on the ELT can reach the signal-to-noise needed to study accretion and outflows in YSOs as faint as H=24 mag in star-forming regions beyond 5 kpc.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper presents the science case for using SHARP on the ESO-ELT to examine star-disk interactions in low-mass young stellar objects located in low-metallicity star-forming regions of the outer Milky Way and the Magellanic Clouds. It shows that extreme adaptive optics and multiplexing allow SHARP to survey large areas with spatial resolution roughly three times better than JWST while reaching faint embedded sources. Calculations with the SHARP exposure time calculator establish that the instrument meets the sensitivity requirements for both continuum and emission-line observations of these distant targets, extending accretion and outflow studies to very low-mass and substellar regimes. This performance would open studies of jets, winds, photo-evaporation, and multiple systems at separations down to 150 au in the outer Galaxy.

Core claim

Using the SHARP exposure time calculator the authors demonstrate that SHARP can achieve the required signal-to-noise both for the continuum and emission lines to investigate accretion and outflows in YSOs in distant (d>5 kpc) SFRs, including those relatively embedded, and observe very faint YSOs (H~24 mag), allowing extension of studies to very low-mass YSOs in distant SFRs and down to substellar objects in the outer Milky Way.

What carries the argument

The SHARP exposure time calculator, which predicts NIR sensitivity and spatial resolution for observations of embedded YSOs.

If this is right

  • Accretion, jet, wind and photo-evaporation processes can be studied down to 0.2 solar masses in the Magellanic Clouds.
  • Jets and outflows become accessible in targets several magnitudes fainter than current instruments allow.
  • Wide binaries and multiple systems at separations of ~1600 au can be resolved at 50 kpc distances in low-metallicity settings.
  • Substellar YSOs become reachable in outer Milky Way star-forming regions at distances up to 10 kpc.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Direct comparison of disk evolution metrics between low-metallicity and solar-metallicity regions would become feasible for the first time at these masses and distances.
  • Statistical samples of outflow properties in massive clusters could test whether low metallicity alters mass-loss rates or launching radii.
  • Repeated observations of the same faint targets over years could reveal time variability in accretion signatures at distances previously inaccessible.

Load-bearing premise

The exposure time calculator gives accurate predictions of real on-sky performance for NIR observations of embedded YSOs at the ELT site, including delivered Strehl ratio and throughput.

What would settle it

On-sky commissioning data for SHARP showing signal-to-noise ratios for H~24 mag embedded YSOs that fall well below the ETC predictions under typical ELT conditions.

Figures

Figures reproduced from arXiv: 2606.30867 by Alessio Caratti o Garatti, Fedor Getman, Juan Manuel Alcala', Linda Podio, Loredana Prisinzano, Mario Giuseppe Guarcello, Paolo Franzetti, Rosaria Bonito.

Figure 1
Figure 1. Figure 1: Regarding outflows, McLeod et al. (2018, 2024) reported the first detection of a bipolar collimated jet, HH 1177, in the Hα line, driven by a 8 M⊙ star in the LMC. The massive YSO is also surrounded by a keplerian disk, which makes this sys￾tem similar to disk-jet systems observed in the Milky Way (e.g. Flores-Rivera et al. 2023; Bacciotti et al. 2025). At difference with accreting YSO in the MW, however, … view at source ↗
Figure 1
Figure 1. Figure 1: Examples of Lacc– Lline relationships in the NIR for the Paβ (upper left), Paγ (upper right), Paδ (lower left) and Brγ (lower right) lines. In all panels line detections are represented with the blue dots, while upper limits with green empty circles. The linear fits are indicated with the reddish lines. Figure adapted from Alcalá et al. (2017). it visible at optical wavelengths. As discussed by McLeod et a… view at source ↗
Figure 2
Figure 2. Figure 2: NGC 346, a SFR in the Small Magellanic Cloud, observed with NIRCam onboard JWST, with overlapped the MORFEO MCAO corrected area (D [PITH_FULL_IMAGE:figures/full_fig_p006_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: X-Shooter spectrum of the CTTS Sz 88 A in the NIR, used as template for the SHARP ETC. Several of the most prominent accretion tracers are marked. [PITH_FULL_IMAGE:figures/full_fig_p007_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: H vs. H − K diagram of theoretical 1 and 5 Myr isochrones with [M/H]= −0.5, and with the H magnitude shifted at a distance of 50 kpc. The isochrones, drawn from the PARSEC tracks V 1.2S (Bressan et al. 2012, see also the web site https://stev.oapd.inaf.it/PARSEC/tools.html), are shown for two values of extinction namely, AV= 0 mag and AV= 5 mag in blue and red, respectively. Various YSO masses are labeled … view at source ↗
Figure 5
Figure 5. Figure 5: Plot of S/N ratio versus wavelength as output from the ETC calculations for the faintest YSO case (H =24 mag) and the NEXUS calculation for a resolving power of 6000 (see column 3 in [PITH_FULL_IMAGE:figures/full_fig_p009_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: SOFI-ESO-NTT NIR spectrum of the HH 111 jet in the Orion B molecular cloud (adapted from Nisini et al. 2002) shifted to the distance of the MCs. [PITH_FULL_IMAGE:figures/full_fig_p009_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: Plot of S/N ratio versus wavelength as output from the ETC calculations for the outflow in HH 111 (H =24 mag) and the NEXUS calculation for a resolving power of 6000. The plot is restricted to the range (12000–18200Å) of the [Fe ii] lines of the template spectrum shown in [PITH_FULL_IMAGE:figures/full_fig_p010_7.png] view at source ↗
read the original abstract

As part of the science book of SHARP, we present here the science case of star-disk interaction of low-mass (\Mstar$\leq$2\Msun) young stellar objects (YSOs), in low-metallicity (Z$<$ 0.2 \Zsun) star forming regions (SFRs) and supermassive star clusters, using the SHARP instrument mounted on the ESO-ELT. Extreme adaptive optics (AOs), with a spatial resolution a factor $\sim$3 better than JWST, as well as sensitive multiplexing capabilities, uniquely offered by SHARP, are essential to efficiently survey the whole area of low-Z SFRs and massive clusters in the outer Milky Way (MW) Galaxy and in the Magellanic Clouds (MCs). Using the SHARP exposure time calculator (ETC) we demonstrate that SHARP can achieve the required signal-to-noise, both for the continuum and emission lines, to investigate accretion and outflows in YSOs in distant (d$>$5\,kpc) SFRs, including those relatively embedded. SHARP will be able to observe very faint YSOs ($H\sim$\,24\,mag), allowing us extending studies to very low-mass YSOs in distant SFRs. The performance of SHARP in terms of sensitivity and spatial resolution in the NIR will provide significant insights into the evolution of protoplanetary disks in low-metallicity and massive environments: studies of accretion, jets/winds and photo-evaporation processes, down to the very low-mass ($\sim$0.2\,\Msun) regime in the MCs, and down to substellar YSOs in SFRs of the outer MW Galaxy (d\,$\lesssim$\,10\,kpc), will be possible. SHARP will also be able to observe jets/outflows in targets that are several magnitudes fainter than those reachable with current instruments, and will facilitate studies in low metallicity environments of wide binaries and multiple systems, with separations of $\sim$1600\,au, at a distance $\sim$50\,kpc scale, and of $\sim$150\,au, in regions of the outer MW Galaxy (d $\sim$10\,kpc).

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript presents the science case for the SHARP instrument on the ESO-ELT to study accretion and outflows in low-mass (M_star ≤ 2 M_sun) young stellar objects in low-metallicity (Z < 0.2 Z_sun) star-forming regions of the outer Milky Way and Magellanic Clouds. It highlights SHARP's extreme AO for ~3× better resolution than JWST and multiplexing capabilities, and uses the SHARP exposure time calculator to claim that the instrument can reach the required S/N for continuum and emission lines on embedded YSOs at d > 5 kpc, including very faint sources at H ~ 24 mag, enabling studies down to ~0.2 M_sun in the MCs and substellar regimes in outer Galaxy SFRs.

Significance. If the ETC-based performance projections are borne out on sky, the paper would usefully document how SHARP could uniquely enable resolved NIR studies of jets, accretion, and disk photo-evaporation in previously inaccessible low-Z and distant environments, extending current work on YSOs by several magnitudes in sensitivity and to wider binary separations at 10–50 kpc distances.

major comments (2)
  1. [ETC demonstration section] The section presenting the SHARP ETC results: the central quantitative claim (sufficient S/N for H ~ 24 mag embedded YSOs at d > 5 kpc) rests solely on forward-model ETC outputs with no tabulated input parameters (Strehl ratio, throughput, background, extinction law), no sensitivity analysis to variations in those parameters, and no comparison to on-sky performance of existing AO systems on similar reddened targets; this directly undermines the load-bearing sensitivity assertions.
  2. [Abstract] Abstract and performance claims paragraph: the statement that extreme AO provides 'a spatial resolution a factor ~3 better than JWST' is presented without any supporting calculation, table, or reference to delivered Strehl or PSF metrics at the relevant NIR wavelengths for the ELT site, leaving the resolution advantage unquantified for the YSO science case.
minor comments (2)
  1. [Abstract] Notation for solar mass and metallicity is inconsistent between the abstract (\Mstar, \Msun, \Zsun) and the body text; standardize to a single LaTeX macro set.
  2. [Performance claims] The distance and magnitude limits (d > 5 kpc, H ~ 24 mag) are stated without error bars or the precise ETC exposure times that achieve the quoted S/N; adding a short table of assumed parameters and resulting integration times would improve clarity.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their constructive comments on the quantitative support for our performance claims. We address each major point below and will revise the manuscript to strengthen the presentation of the ETC results and resolution metrics.

read point-by-point responses

  1. Referee: [ETC demonstration section] The section presenting the SHARP ETC results: the central quantitative claim (sufficient S/N for H ~ 24 mag embedded YSOs at d > 5 kpc) rests solely on forward-model ETC outputs with no tabulated input parameters (Strehl ratio, throughput, background, extinction law), no sensitivity analysis to variations in those parameters, and no comparison to on-sky performance of existing AO systems on similar reddened targets; this directly undermines the load-bearing sensitivity assertions.

    Authors: We agree that the manuscript as submitted lacks the supporting details for the ETC calculations. In the revised version we will insert a dedicated table (or subsection) listing the input parameters used (Strehl ratio, throughput, background, extinction law) together with a short sensitivity analysis showing the impact of reasonable variations in those parameters on the derived S/N. We will also add a brief comparison to published on-sky performance of existing NIR AO systems (e.g., VLT/SPHERE or Keck/NIRC2) on reddened YSOs to anchor the projections. These additions will make the sensitivity assertions fully traceable. revision: yes

  2. Referee: [Abstract] Abstract and performance claims paragraph: the statement that extreme AO provides 'a spatial resolution a factor ~3 better than JWST' is presented without any supporting calculation, table, or reference to delivered Strehl or PSF metrics at the relevant NIR wavelengths for the ELT site, leaving the resolution advantage unquantified for the YSO science case.

    Authors: The factor-of-three claim originates from the ratio of the ELT (39 m) and JWST (6.5 m) apertures combined with expected delivered Strehl ratios in the NIR, but we acknowledge that the manuscript provides neither the explicit calculation nor a reference to ELT AO performance documents. In revision we will add a short quantitative paragraph (or footnote) giving the expected diffraction-limited FWHM at the relevant wavelengths, the assumed Strehl, and a citation to the relevant ESO ELT AO performance estimates (e.g., MAORY or MICADO documentation). This will quantify the resolution advantage for the YSO science case. revision: yes

Circularity Check

0 steps flagged

No circularity: forward projection from external ETC specs

full rationale

The paper presents a science case for SHARP on ELT by invoking the instrument's exposure time calculator to project S/N performance on faint YSOs. No derivations, equations, fitted parameters, or self-citations are used to generate the central claim; the ETC is treated as an independent input based on instrument specifications. The assessment does not reduce any prediction to its own inputs by construction, nor does it rely on load-bearing self-citations or ansatzes. This is a standard forward-looking capability statement with no internal loop.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

This is an instrument science case paper containing no mathematical derivations, free parameters fitted to data, background axioms, or newly postulated physical entities. All claims rest on the pre-existing design specifications and exposure time calculator of the SHARP instrument.

pith-pipeline@v0.9.1-grok · 5992 in / 1303 out tokens · 60198 ms · 2026-07-01T01:21:24.981240+00:00 · methodology

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Works this paper leans on

83 extracted references · 3 canonical work pages · 2 internal anchors

  1. [1]

    & D'Elia, V

    Alcal\'a, J., Natta, A., Manara, C., Spezzi, L., Stelzer, B., Frasca, A., Biazzo, K., Covino, E., Randich, S., Rigliaco, E., Testi, L., Comerón, F., Cupani, G. & D'Elia, V. X-shooter spectroscopy of young stellar objects. IV. Accretion in low-mass stars and substellar objects in Lupus. . 561 pp. A2 (2014,1)

    2014

  2. [2]

    & Rigliaco, E

    Alcal\'a, J., Manara, C., Natta, A., Frasca, A., Testi, L., Nisini, B., Stelzer, B., Williams, J., Antoniucci, S., Biazzo, K., Covino, E., Esposito, M., Getman, F. & Rigliaco, E. X-shooter spectroscopy of young stellar objects in Lupus. Accretion properties of class II and transitional objects. . 600 pp. A20 (2017,4)

    2017

  3. [3]

    & Brown, A

    Alcal\'a, J., Manara, C., France, K., Schneider, C., Arulanantham, N., Miotello, A., Günther, H. & Brown, A. HST spectra reveal accretion in MY Lupi. . 629 pp. A108 (2019,9)

    2019

  4. [4]

    & Zeidler, P

    Allen, M., Anania, R., Andersen, M., Aru, M., Ballabio, G., Ballering, N., Beccari, G., Berné, O., Bik, A., Boyden, R., Coleman, G., D\'iaz-Berrios, J., Eatson, J., Frediani, J., Forbrich, J., Gkimisi, K., Goicoechea, J., Gupta, S., Guarcello, M., Haworth, T., Henney, W., Isella, A., Itrich, D., Keyte, L., Kim, J., Kuhn, M., Le Petit, F., Luo, L., Manara,...

    2025

  5. [5]

    Low-Metallicity Star Formation Survey in Sh2-284 (LZ-STAR). II. The inital mass function

    Andersen, M., Brizawasi, A., Cheng, Y., Tan, J., Fedriani, R., Armstrong, J. & Robberto, M. Low-Metallicity Star Formation Survey in Sh2-284 (LZ-STAR). II. The inital mass function. ArXiv E-prints . pp. arXiv:2505.12802 (2025,5)

    work page internal anchor Pith review Pith/arXiv arXiv 2025

  6. [6]

    & Brown, J

    Andrews, S., Wilner, D., Espaillat, C., Hughes, A., Dullemond, C., McClure, M., Qi, C. & Brown, J. Resolved Images of Large Cavities in Protoplanetary Transition Disks. . 732, 42 (2011,5)

    2011

  7. [7]

    FN2” ref-type=“fn

    Aru, M., Maucó, K., Manara, C., Haworth, T., Facchini, S., McLeod, A., Miotello, A., Petr-Gotzens, M., Robberto, M., Rosotti, G., Vicente, S., Winter, A. & Ansdell, M. Kaleidoscope of irradiated disks: MUSE observations of proplyds in the Orion Nebula Cluster. I. Sample presentation and ionization front sizes<xref rid=“FN2” ref-type=“fn”/>. . 687 pp. A93 (2024,7)

    2024

  8. [8]

    & Ferreira, J

    Bacciotti, F., Nony, T., Podio, L., Dougados, C., Garufi, A., Cabrit, S., Codella, C., Zimniak, N. & Ferreira, J. ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT): VII. The layered molecular outflow from HL Tau and its relationship with the ringed disk. . 704 pp. A157 (2025,12)

    2025

  9. [9]

    & Meyer, M

    Bastian, N., Covey, K. & Meyer, M. A Universal Stellar Initial Mass Function? A Critical Look at Variations. . 48 pp. 339-389 (2010,9)

    2010

  10. [10]

    & Bromm, V

    Bate, M., Bonnell, I. & Bromm, V. The formation of a star cluster: predicting the properties of stars and brown dwarfs. . 339, 577-599 (2003,3)

    2003

  11. [11]

    & Catalano, S

    Biazzo, K., Pasquini, L., Girardi, L., Frasca, A., Da Silva, L., Setiawan, J., Marilli, E., Hatzes, A. & Catalano, S. Deriving temperature, mass, and age of evolved stars from high-resolution spectra. Application to field stars and the open cluster IC 4651. . 475, 981-989 (2007,12)

    2007

  12. [12]

    Accretion properties of young stellar objects in low-metallicity environments

    Biazzo, K. Accretion properties of young stellar objects in low-metallicity environments. Italian National Conference Of Star And Planet Formation . pp. 5 (2025,3)

    2025

  13. [13]

    & Ibgui, L

    Bonito, R., Orlando, S., Argiroffi, C., Miceli, M., Peres, G., Matsakos, T., Stehle, C. & Ibgui, L. Magnetohydrodynamic Modeling of the Accretion Shocks in Classical T Tauri Stars: The Role of Local Absorption in the X-Ray Emission. . 795, L34 (2014,11)

    2014

  14. [14]

    & Favata, F

    Bonito, R., Orlando, S., Peres, G., Eislöffel, J., Miceli, M. & Favata, F. Generation of radiative knots in a randomly pulsed protostellar jet. I. Dynamics and energetics. . 511 pp. A42 (2010,2)

    2010

  15. [15]

    & Gizis, J

    Bonito, R., Venuti, L., Ustamujic, S., Yoachim, P., Street, R., Prisinzano, L., Hartigan, P., Guarcello, M., Stassun, K., Giannini, T., Feigelson, E., Caratti o Garatti, A., Orlando, S., Clarkson, W., McGehee, P., Bellm, E. & Gizis, J. Young Stellar Objects, Accretion Disks, and Their Variability with Rubin Observatory LSST. . 265, 27 (2023,3)

    2023

  16. [16]

    & Nanni, A

    Bressan, A., Marigo, P., Girardi, L., Salasnich, B., Dal Cero, C., Rubele, S. & Nanni, A. PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code. . 427, 127-145 (2012,11)

    2012

  17. [17]

    & Gordon, K

    Calvet, N., Muzerolle, J., Briceño, C., Hernández, J., Hartmann, L., Saucedo, J. & Gordon, K. The Mass Accretion Rates of Intermediate-Mass T Tauri Stars. . 128, 1294-1318 (2004,9)

    2004

  18. [18]

    & Stassun, K

    Cao, L. & Stassun, K. The Relationship of Stellar Radius Inflation to Rotation and Magnetic Starspots at 10-670 Myr. . 988, L1 (2025,7)

    2025

  19. [19]

    & Lorenzetti, D

    Caratti o Garatti, A., Giannini, T., Nisini, B. & Lorenzetti, D. H _2 active jets in the near IR as a probe of protostellar evolution. . 449, 1077-1088 (2006,4)

    2006

  20. [20]

    & Sanna, A

    Caratti o Garatti, A., Stecklum, B., Linz, H., Garcia Lopez, R. & Sanna, A. A near-infrared spectroscopic survey of massive jets towards extended green objects. . 573 pp. A82 (2015,1)

    2015

  21. [21]

    & Wright, G

    Caratti o Garatti, A., Ray, T., Kavanagh, P., McCaughrean, M., Gieser, C., Giannini, T., Van Dishoeck, E., Justtanont, K., Van Gelder, M., Francis, L., Beuther, H., Tychoniec, Ł., Nisini, B., Navarro, M., Devaraj, R., Reyes, S., Nazari, P., Klaassen, P., Güdel, M., Henning, T., Lagage, P., Östlin, G., Vandenbussche, B., Waelkens, C. & Wright, G. JWST Obse...

    2024

  22. [22]

    & Tanaka, K

    Cheng, Y., Tan, J., Andersen, M., Fedriani, R., Zhang, Y., Robberto, M., Li, Z. & Tanaka, K. LZ-STAR Survey: Low-metallicity Star Formation Survey of Sh2-284. I. Ordered Massive Star Formation in the Outer Galaxy. . 990, 173 (2025,9)

    2025

  23. [23]

    & Hony, S

    Cusano, F., Ripepi, V., Alcalá, J., Gandolfi, D., Marconi, M., Degl'Innocenti, S., Palla, F., Guenther, E., Bernabei, S., Covino, E., Neiner, C., Puga, E. & Hony, S. Pre-main-sequence stars in the star-forming complex Sh 2-284. . 410, 227-240 (2011,1)

    2011

  24. [24]

    & Aspin, C

    Davis, C., Ray, T., Desroches, L. & Aspin, C. Near-infrared echelle spectroscopy of Class I protostars: molecular hydrogen emission-line (MHEL) regions revealed. . 326, 524-538 (2001,9)

    2001

  25. [25]

    & Chrysostomou, A

    Davis, C., Whelan, E., Ray, T. & Chrysostomou, A. Near-IR echelle spectroscopy of Class I protostars: Mapping Forbidden Emission-Line (FEL) regions in [FeII]. . 397 pp. 693-710 (2003,1)

    2003

  26. [26]

    & Keyes, C

    De Marchi, G., Giardino, G., Biazzo, K., Panagia, N., Sabbi, E., Beck, T., Robberto, M., Zeidler, P., Jones, O., Meixner, M., Fahrion, K., Habel, N., Nally, C., Hirschauer, A., Soderblom, D., Nayak, O., Lenkić, L., Rogers, C., Brandl, B. & Keyes, C. Protoplanetary Disks around Sun-like Stars Appear to Live Longer When the Metallicity is Low. . 977, 214 (2024,12)

    2024

  27. [27]

    & Landstreet, J

    Donati, J. & Landstreet, J. Magnetic Fields of Nondegenerate Stars. . 47, 333-370 (2009,9)

    2009

  28. [28]

    & White, R

    Doppmann, G., Jaffe, D. & White, R. Stellar Properties of Pre-Main-Sequence Stars from High-Resolution Near-Infrared Spectra. . 126, 3043-3057 (2003,12)

    2003

  29. [29]

    & Nisini, B

    Dougados, C., Bacciotti, F., Cabrit, S. & Nisini, B. Deriving Physical Diagnostics from Observations. Lecture Notes In Physics, Berlin Springer Verlag . 793 pp. 213 (2010)

    2010

  30. [30]

    & Young, K

    Dunham, M., Allen, L., Evans, N., Broekhoven-Fiene, H., Cieza, L., Di Francesco, J., Gutermuth, R., Harvey, P., Hatchell, J., Heiderman, A., Huard, T., Johnstone, D., Kirk, J., Matthews, B., Miller, J., Peterson, D. & Young, K. Young Stellar Objects in the Gould Belt. . 220, 11 (2015,9)

    2015

  31. [31]

    & Monaco, L

    Ellerbroek, L., Podio, L., Kaper, L., Sana, H., Huppenkothen, D., De Koter, A. & Monaco, L. The outflow history of two Herbig-Haro jets in RCW 36: HH 1042 and HH 1043. . 551 pp. A5 (2013,3)

    2013

  32. [32]

    & Sargent, A

    Evans, N., Dunham, M., Jørgensen, J., Enoch, M., Mer\'in, B., Van Dishoeck, E., Alcal\'a, J., Myers, P., Stapelfeldt, K., Huard, T., Allen, L., Harvey, P., Van Kempen, T., Blake, G., Koerner, D., Mundy, L., Padgett, D. & Sargent, A. The Spitzer c2d Legacy Results: Star-Formation Rates and Efficiencies; Evolution and Lifetimes. . 181, 321-350 (2009,4)

    2009

  33. [33]

    & Tychoniec, Ł

    Fiorellino, E., Alcal\'a, J., Manara, C., Pittman, C., Ábrahám, P., Venuti, L., Cabrit, S., Claes, R., Fang, M., Kóspál, Á., Lodato, G., Mauco, K. & Tychoniec, Ł. PENELLOPE: VII. Revisiting empirical relations to measure accretion luminosity. . 704 pp. A42 (2025,12)

    2025

  34. [34]

    & Aoyama, Y

    Flores-Rivera, L., Flock, M., Kurtovic, N., Husemann, B., Banzatti, A., Ringqvist, S., Kamann, S., Müller, A., Fendt, C., Garc\'ia Lopez, R., Marleau, G., Henning, T., Carrasco-González, C., Van Boekel, R., Keppler, M., Launhardt, R. & Aoyama, Y. Forbidden emission lines in protostellar outflows and jets with MUSE. . 670 pp. A126 (2023,2)

    2023

  35. [35]

    & Zaggia, S

    Franciosini, E., Tognelli, E., Degl'Innocenti, S., Prada Moroni, P., Randich, S., Sacco, G., Magrini, L., Pancino, E., Lanzafame, A., Smiljanic, R., Prisinzano, L., Sanna, N., Roccatagliata, V., Bonito, R., De Laverny, P., Gutiérrez Albarrán, M., Montes, D., Jiménez-Esteban, F., Gilmore, G., Bergemann, M., Carraro, G., Damiani, F., Gonneau, A., Hourihane,...

    2022

  36. [36]

    & Antoniucci, S

    Frasca, A., Biazzo, K., Alcalá, J., Manara, C., Stelzer, B., Covino, E. & Antoniucci, S. X-shooter spectroscopy of young stellar objects in Lupus. Atmospheric parameters, membership, and activity diagnostics. . 602 pp. A33 (2017,6)

    2017

  37. [37]

    & Vitali, F

    Gangi, M., Antoniucci, S., Biazzo, K., Frasca, A., Nisini, B., Alcalá, J., Giannini, T., Manara, C., Giunta, A., Harutyunyan, A., Munari, U. & Vitali, F. GIARPS High-resolution Observations of T Tauri stars (GHOsT). IV. Accretion properties of the Taurus-Auriga young association. . 667 pp. A124 (2022,11)

    2022

  38. [38]

    & Flower, D

    Giannini, T., McCoey, C., Caratti o Garatti, A., Nisini, B., Lorenzetti, D. & Flower, D. On the excitation of the infrared knots along protostellar jets. . 419 pp. 999-1014 (2004,6)

    2004

  39. [39]

    & Podio, L

    Giannini, T., Antoniucci, S., Nisini, B., Bacciotti, F. & Podio, L. Solving the Excitation and Chemical Abundances in Shocks: The Case of HH 1. . 814, 52 (2015,11)

    2015

  40. [40]

    & Stelzer, B

    Giannini, T., Antoniucci, S., Nisini, B., Lorenzetti, D., Alcal\'a, J., Bacciotti, F., Bonito, R., Podio, L. & Stelzer, B. Empirical Determination of Einstein A-coefficient Ratios of Bright [Fe II] Lines. . 798, 33 (2015,1)

    2015

  41. [41]

    & Wright, N

    Guarcello, M., Biazzo, K., Drake, J., Micela, G., Prisinzano, L., Sciortino, S., Damiani, F., Flaccomio, E., Neiner, C. & Wright, N. Dispersal timescale of protoplanetary disks in the low-metallicity young cluster Dolidze 25. . 650 pp. A157 (2021,6)

    2021

  42. [42]

    & Calvet, N

    Gullbring, E., Hartmann, L., Brice\ no, C. & Calvet, N. Disk Accretion Rates for T Tauri Stars. . 492, 323-341 (1998,1)

    1998

  43. [43]

    & Ghandour, L

    Hartigan, P., Edwards, S. & Ghandour, L. Disk Accretion and Mass Loss from Young Stars. . 452 pp. 736 (1995,10)

    1995

  44. [44]

    & Calvet, N

    Hartmann, L., Herczeg, G. & Calvet, N. Accretion onto Pre-Main-Sequence Stars. . 54 pp. 135-180 (2016,9)

    2016

  45. [45]

    Accretion Processes in Star Formation

    Hartmann, L. Accretion Processes in Star Formation. (1998)

    1998

  46. [46]

    & Hillenbrand, L

    Herczeg, G. & Hillenbrand, L. UV Excess Measures of Accretion onto Young Very Low Mass Stars and Brown Dwarfs. . 681, 594-625 (2008,7)

    2008

  47. [47]

    & Brown, A

    Ingleby, L., Calvet, N., Herczeg, G., Blaty, A., Walter, F., Ardila, D., Alexander, R., Edwards, S., Espaillat, C., Gregory, S., Hillenbrand, L. & Brown, A. Accretion Rates for T Tauri Stars Using Nearly Simultaneous Ultraviolet and Optical Spectra. . 767, 112 (2013,4)

    2013

  48. [48]

    & Mamta Uncovering the Hidden Physical Structures and Protostellar Activities in the Low-metallicity S284-RE Region: Results from ALMA and JWST

    Jadhav, O., Dewangan, L., Verma, A., Bhadari, N., Maity, A., Sharma, S. & Mamta Uncovering the Hidden Physical Structures and Protostellar Activities in the Low-metallicity S284-RE Region: Results from ALMA and JWST. . 980, 133 (2025,2)

    2025

  49. [49]

    & Deliyannis, C

    Jeffries, R., Jackson, R., Sun, Q. & Deliyannis, C. The effects of rotation on the lithium depletion of G- and K-dwarfs in Messier 35. . 500, 1158-1177 (2021,1)

    2021

  50. [50]

    & Rodenhuis, M

    Johns-Krull, C., Chen, W., Valenti, J., Jeffers, S., Piskunov, N., Kochukhov, O., Makaganiuk, V., Stempels, H., Snik, F., Keller, C. & Rodenhuis, M. Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TW Hydrae. . 765, 11 (2013,3)

    2013

  51. [51]

    & Vink, J

    Kalari, V. & Vink, J. Pre-main-sequence Accretion in the Low Metallicity Galactic Star-forming Region Sh 2-284. . 800, 113 (2015,2)

    2015

  52. [52]

    & Rigliaco, E

    Manara, C., Testi, L., Herczeg, G., Pascucci, I., Alcal\'a, J., Natta, A., Antoniucci, S., Fedele, D., Mulders, G., Henning, T., Mohanty, S., Prusti, T. & Rigliaco, E. X-shooter study of accretion in Chamaeleon I. II. A steeper increase of accretion with stellar mass for very low-mass stars?. . 604 pp. A127 (2017,8)

    2017

  53. [53]

    Accretion onto young stars: the key to disk evolution

    Manara, C. Accretion onto young stars: the key to disk evolution. ArXiv E-prints . pp. arXiv:1712.09570 (2017,12)

    work page internal anchor Pith review Pith/arXiv arXiv 2017

  54. [54]

    & Zsidi, G

    Manara, C., Frasca, A., Venuti, L., Siwak, M., Herczeg, G., Calvet, N., Hernandez, J., Tychoniec, Ł., Gangi, M., Alcal\'a, J., Boffin, H., Nisini, B., Robberto, M., Briceno, C., Campbell-White, J., Sicilia-Aguilar, A., McGinnis, P., Fedele, D., Kóspál, Á., Ábrahám, P., Alonso-Santiago, J., Antoniucci, S., Arulanantham, N., Bacciotti, F., Banzatti, A., Bec...

    2021

  55. [55]

    & Evans, C

    McLeod, A., Reiter, M., Kuiper, R., Klaassen, P. & Evans, C. A parsec-scale optical jet from a massive young star in the Large Magellanic Cloud. . 554, 334-336 (2018,2)

    2018

  56. [56]

    & Ginsburg, A

    McLeod, A., Klaassen, P., Reiter, M., Henshaw, J., Kuiper, R. & Ginsburg, A. A probable Keplerian disk feeding an optically revealed massive young star. . 625, 55-59 (2024,1)

    2024

  57. [57]

    & Calvet, N

    Muzerolle, J., Hartmann, L. & Calvet, N. Emission-Line Diagnostics of T Tauri Magnetospheric Accretion. I. Line Profile Observations. . 116, 455-468 (1998,7)

    1998

  58. [58]

    & D'Elia, V

    Natta, A., Testi, L., Alcal\'a, J., Rigliaco, E., Covino, E., Stelzer, B. & D'Elia, V. X-shooter spectroscopy of young stellar objects. V. Slow winds in T Tauri stars. . 569 pp. A5 (2014,9)

    2014

  59. [59]

    & Lorenzetti, D

    Nisini, B., Caratti o Garatti, A., Giannini, T. & Lorenzetti, D. 1-2.5 mu m spectra of jets from young stars: Strong Fe II emission in HH111, HH240-241 and HH120. . 393 pp. 1035-1051 (2002,10)

    2002

  60. [60]

    & Biazzo, K

    Nisini, B., Antoniucci, S., Alcal\'a, J., Giannini, T., Manara, C., Natta, A., Fedele, D. & Biazzo, K. Connection between jets, winds and accretion in T Tauri stars. The X-shooter view. . 609 pp. A87 (2018,1)

    2018

  61. [61]

    & Fischer, W

    P\'erez Paolino, F., Bary, J., Hillenbrand, L., Markham, M. & Fischer, W. Starspots as an Explanation for the Mysterious IYJ Continuum Excess Emission in Classical T Tauri Stars. . 978, 32 (2025,1)

    2025

  62. [62]

    & Ferreira, J

    Pesenti, N., Dougados, C., Cabrit, S., O'Brien, D., Garcia, P. & Ferreira, J. Near-IR [Fe II] emission diagnostics applied to cold disk winds in young stars. . 410 pp. 155-164 (2003,10)

    2003

  63. [63]

    & Ray, T

    Podio, L., Bacciotti, F., Nisini, B., Eislöffel, J., Massi, F., Giannini, T. & Ray, T. Recipes for stellar jets: results of combined optical/infrared diagnostics. . 456, 189-204 (2006,9)

    2006

  64. [64]

    & White, G

    Podio, L., Kamp, I., Flower, D., Howard, C., Sandell, G., Mora, A., Aresu, G., Brittain, S., Dent, W., Pinte, C. & White, G. Herschel/PACS observations of young sources in Taurus: the far-infrared counterpart of optical jets. . 545 pp. A44 (2012,9)

    2012

  65. [65]

    & Gieles, M

    Portegies Zwart, S., McMillan, S. & Gieles, M. Young Massive Star Clusters. . 48 pp. 431-493 (2010,9)

    2010

  66. [66]

    & Venuti, L

    Pittman, C., Espaillat, C., Robinson, C., Thanathibodee, T., Calvet, N., Wendeborn, J., Hernández, J., Manara, C., Walter, F., Ábrahám, P., Alcal\'a, J., Alencar, S., Arulanantham, N., Cabrit, S., Eislöffel, J., Fiorellino, E., France, K., Gangi, M., Grankin, K., Herczeg, G., Kóspál, Á., Mendigut\'ia, I., Serna, J. & Venuti, L. Towards a Comprehensive Vie...

    2022

  67. [67]

    & Girardi, L

    Prisinzano, L., Bonito, R., Mazzi, A., Damiani, F., Ustamujic, S., Yoachim, P., Street, R., Guarcello, M., Venuti, L., Clarkson, W., Jones, L. & Girardi, L. Rubin LSST Observing Strategies to Maximize Volume and Uniformity Coverage of Star-forming Regions in the Galactic Plane. . 265, 39 (2023,4)

    2023

  68. [68]

    & Van Terwisga, S

    Ram\'irez-Tannus, M., Bik, A., Cuijpers, L., Waters, R., Göppl, C., Henning, T., Kamp, I., Preibisch, T., Getman, K., Chaparro, G., Cuartas-Restrepo, P., De Koter, A., Feigelson, E., Grant, S., Haworth, T., Hernández, S., Kuhn, M., Perotti, G., Povich, M., Reiter, M., Roccatagliata, V., Sabbi, E., Tabone, B., Winter, A., McLeod, A., Van Boekel, R. & Van T...

    2023

  69. [69]

    & Stelzer, B

    Rigliaco, E., Natta, A., Testi, L., Randich, S., Alcal\'a, J., Covino, E. & Stelzer, B. X-shooter spectroscopy of young stellar objects. I. Mass accretion rates of low-mass T Tauri stars in -Orionis. . 548 pp. A56 (2012,12)

    2012

  70. [70]

    & Rodr\'iguez-Franco, A

    Rivilla, V., Mart\'in-Pintado, J., Jim\'enez-Serra, I. & Rodr\'iguez-Franco, A. The role of low-mass star clusters in massive star formation. The Orion case. . 554 pp. A48 (2013,6)

    2013

  71. [71]

    & Henning, T

    Rochau, B., Gouliermis, D., Brandner, W., Dolphin, A. & Henning, T. The Star-forming Region NGC 346 in the Small Magellanic Cloud with Hubble Space Telescope ACS Observations. II. Photometric Study of the Intermediate-Age Star Cluster BS 90. . 664, 322-331 (2007,7)

    2007

  72. [72]

    & Brandl, B

    Rogers, C., De Marchi, G. & Brandl, B. Externally irradiated young stars in NGC 3603: A JWST NIRSpec catalogue of pre-main-sequence stars in a massive star formation region. . 698 pp. A172 (2025,6)

    2025

  73. [73]

    & Cioni, M

    Romita, K., Lada, E. & Cioni, M. Embedded Clusters in the Large Magellanic Cloud Using the VISTA Magellanic Clouds Survey. . 821, 51 (2016,4)

    2016

  74. [74]

    & Vietri, G

    Saracco, P., Conconi, P., Arcidiacono, C., Portaluri, E., Mahmoodzadeh, H., D'Orazi, V., Fedele, D., Gargiulo, A., Vanzella, E., Franzetti, P., Arosio, I., Barbalini, L., Lops, G., Molinari, E., Cascone, E., Cianniello, V., D'Auria, D., De Caprio, V., Di Antonio, I., Di Francesco, B., Di Rico, G., Eredia, C., Fumana, M., Greggio, D., Rodeghiero, G., Scale...

    work page arXiv 2024

  75. [75]

    & Stassun, K

    Somers, G. & Stassun, K. A Measurement of Radius Inflation in the Pleiades and Its Relation to Rotation and Lithium Depletion. . 153, 101 (2017,3)

    2017

  76. [76]

    & Pinsonneault, M

    Somers, G., Cao, L. & Pinsonneault, M. The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones for Testing the Effects of Starspots on Structure and Colors. . 891, 29 (2020,3)

    2020

  77. [77]

    & Wright, G

    Van Dishoeck, E., Tychoniec, Ł., Rocha, W., Slavicinska, K., Francis, L., Van Gelder, M., Ray, T., Beuther, H., Caratti o Garatti, A., Brunken, N., Chen, Y., Devaraj, R., Geers, V., Gieser, C., Greene, T., Justtanont, K., Le Gouellec, V., Kavanagh, P., Klaassen, P., Janssen, A., Navarro, M., Nazari, P., Notsu, S., Perotti, G., Ressler, M., Reyes, S., Sell...

    2025

  78. [78]

    & Haworth, T

    Winter, A. & Haworth, T. The external photoevaporation of planet-forming discs. European Physical Journal Plus . 137, 1132 (2022,10)

    2022

  79. [79]

    & Randich, S

    Whelan, E., Ray, T., Bacciotti, F., Natta, A., Testi, L. & Randich, S. A resolved outflow of matter from a brown dwarf. . 435, 652-654 (2005,6)

    2005

  80. [80]

    & Sherman, R

    Wolf-Chase, G., Arvidsson, K., Smutko, M. & Sherman, R. Massive Star Formation, Outflows, and Anomalous H2 Emission in Mol 121 (IRAS 20188+3928). American Astronomical Society Meeting Abstracts \#221 . 221 pp. 251.18 (2013,1)

    2013

Showing first 80 references.