REVIEW 3 major objections 5 minor 99 references
Shocks and complex chemodynamics in the metal-poor starburst galaxy CGCG 007-025 revealed through high-resolution echelle spectroscopy
T0 review · 3 major / 5 minor · reviewed 2026-08-05 · deepseek-v4-flash
Pith's one-line read A broad HeII line in a metal-poor dwarf galaxy points to fast radiative shocks, not stars or an AGN.
desk verdict Strong high-resolution dataset; shock claim rests on under-documented HeII component attribution. read the letter →
The pith
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
The reading
What carries the argument
The load-bearing tool is high-resolution echelle spectroscopy (R≈40,000) combined with multi-Gaussian decomposition of each emission line into narrow (σ≈14 km/s), intermediate (σ≈37 km/s), broad (σ≈200 km/s), and sometimes secondary narrow components. The HeII flux is assigned to the intermediate kinematic component, and the line ratios of that component are compared against the shock-plus-precursor models of Allen et al. (2008). The two-region ionisation model used for chemical abundances treats a low-ionisation zone (O+, N+, S+, S2+, Ar2+) and a high-ionisation zone (O2+, Ne2+, Ar3+), with direct-method electron temperatures from [OIII] λ4363, [SIII] λ6312, and related auroral lines.
What would settle it
A deeper, high-resolution spectrum that detects the predicted broad pedestal (σ≈300–1000 km/s) of Hβ or [OIII] and finds it absent would contradict the fast-shock scenario, as would a resolved measurement showing HeII following the narrow (σ≈14 km/s) component velocities instead of the intermediate component. A positive detection of [NeV] λ3426 in the intermediate component at a level consistent with the shock models would also falsify the precursor-only match.
Extended reading notes
Core claim
The paper argues that the HeII λ4686 emission in the brightest star-forming region of CGCG 007-025 originates in the precursor of a fast radiative shock, with shock velocity constrained to 250–300 km/s. The argument uses the fact that HeII is resolved as a single wide component with σ≈33–35 km/s, matching the intermediate kinematic component of Hβ and [OIII], and that the intermediate-component ratios HeII/Hβ=0.13±0.01 and [OIII]/Hβ=6.3±0.3, combined with a non-detection of [NeV] λ3426, are reproduced only by precursor-only shock models at SMC metallicity. The same high-resolution data also resolve the 6371 Å feature previously reported as coronal [FeX]; the authors identify it as the SiII λ
Load-bearing premise
The HeII line is assumed to come from the same intermediate kinematic component used to measure Hβ and [OIII], so the HeII/Hβ ratio that selects the shock velocity depends on that assignment; if HeII arises in a separate gas phase, the ratio and the inferred shock speed would change.
Editorial extensions
If this is right
- Lower-resolution measurements of CGCG 007-025, which yield integrated HeII/Hβ=0.012±0.003, blend the kinematic components and obscure the shock signature; component-resolved spectroscopy is needed to identify ionisation mechanisms.
- The earlier claimed [FeX] λ6374 detection in this galaxy is reassigned to SiII λ6371, so the case for an intermediate-mass black hole in CGCG 007-025 is not supported by the echelle data.
- Fast radiative shocks should be considered a viable source of HeII emission in metal-poor starbursts, alongside Wolf-Rayet stars and X-ray binaries, especially when the line appears broadened or asymmetric.
- The direct-method abundances place the region at 12+log(O/H)=7.77±0.03, with log(S/O), log(Ar/O), and log(Ne/O) consistent with values in the Milky Way and Magellanic Clouds, reinforcing the view that alpha-element ratios are roughly constant across environments.
- The dataset demonstrates that echelle spectroscopy can disentangle multiple ionisation and kinematic components in local high-redshift analogues, providing a path to interpret unresolved JWST-era spectra of distant galaxies.
Reading between the lines
- If fast shocks are common in low-metallicity starbursts, unresolved HeII-based diagnostics of stellar populations or AGN activity may systematically underestimate shock contributions; this can be tested by applying multi-component fitting to other echelle surveys of dwarf galaxies.
- The shock precursor model makes specific predictions for other intermediate-component line ratios, such as [OII]/Hβ and [NeIII]/Hβ, which could be checked against the same spectra to confirm the precursor identification.
- A deeper observation reaching the predicted broad shock pedestal (σ≈300–1000 km/s) in Hβ or [OIII] would provide a direct kinematic confirmation of the 250–300 km/s shock velocity, since the current data place that signature below the continuum noise.
- The secondary redshifted narrow component seen along the same line of sight may trace an outflow or a separate clump; if shock and outflow are related, spatially resolved velocity maps could link the shock speed to large-scale gas motions.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. Using Magellan/MIKE echelle spectroscopy (R≈40,000, 3350–9410 Å) of the brightest star-forming region in CGCG 007-025, the authors simultaneously model 30 emission lines with a Bayesian two-zone ionization model. They derive electron densities and temperatures, a direct-method metallicity 12+log(O/H)=7.77±0.03, and metal-to-oxygen ratios (S/O, Ar/O, Ne/O, Fe/O) that largely agree with independent lower-resolution CLASSY measurements. The line profiles are decomposed into narrow, intermediate, and broad kinematic components, plus a redshifted secondary narrow component for the brightest lines. The central new claim is that HeII λ4686 is broad (σ≈33–35 km/s) and asymmetric, and that the intermediate-component ratios HeII/Hβ≈0.13 and [OIII]/Hβ≈6.3, together with the absence of [NeV] λ3426, match the precursor-only, SMC-metallicity radiative shock models of Allen et al. (2008), implying a shock velocity v_sh=250–300 km/s. The paper also argues that the previously reported [FeX] detection is a misidentification with SiII λ6371.
Significance. If the shock interpretation holds, the paper makes a strong case that high-resolution échelle spectroscopy can separate a shock precursor from the photoionized HII region in a metal-poor starburst, providing a natural explanation for strong HeII emission without invoking Wolf-Rayet stars, HMXBs, or an AGN/IMBH. The chemical abundance analysis is carefully cross-checked against previous MODS/LBT and MUSE results, and the agreement gives confidence in the data reduction and Bayesian fitting. The reinterpretation of the [FeX] line as SiII is a useful, concrete result. The main scientific value is therefore two-fold: a high-quality chemodynamical benchmark for a local high-redshift analogue, and a falsifiable shock/precursor interpretation that can be tested with similar observations. The latter claim is, however, currently not fully supported by the published fit tables, because the component attribution of the HeII flux is not documented at the same level as the Hβ decomposition.
major comments (3)
- [§4.1, §5.4, Table B1] The load-bearing ratio HeII/Hβ=0.13 is not supported by the published fit tables. Table B1 lists HeII λ4686 as a single Gaussian (flux 5.44±0.57, σ=0.51 Å), while Hβ is decomposed into narrow (397.05), intermediate (40.46), and secondary red components. The quoted 0.13 is simply 5.44/40.46, i.e. it assumes that all HeII flux belongs to the intermediate Hβ component. But §4.1 and Figure 4 state that the HeII profile is asymmetric and requires an additional redshifted Gaussian at ≈+55 km/s with σ≈20 km/s; the flux of this component is not given in any table. If that red excess is included in the 5.44 value, the numerator is not purely the intermediate-component HeII flux; if it is excluded, the decomposition is missing. Since the Allen+08 grid comparison is sensitive to factors of ~2 in HeII/Hβ (Fig. 6, top row), please provide the full HeII decomposition (core, red excess, and any narrow/
- [§5.4, Fig. 6] The exclusion of LMC/solar metallicities and of the shock and precursor+shock columns rests on the non-detection of [NeV] λ3426. The paper shows a hatched 3σ band in Fig. 6, but no numerical 3σ upper limit for [NeV]/Hβ is quoted in the text or in any table, and it is not stated explicitly that the limit applies to the intermediate kinematic component. To make the model-selection step reproducible, give the measured noise and the resulting 3σ upper limit on [NeV] λ3426/Hβ, and state which component it refers to. Without this quantitative limit, the claim that only the SMC-metallicity precursor branch matches the data is not fully documented.
- [§5.4, last two paragraphs] The paper argues that at v_sh=250–300 km/s the shock itself would produce line widths of 300–1000 km/s and is therefore lost in the continuum noise, while the observed σ≈35 km/s component is the precursor. This is a plausible two-phase interpretation, but no model prediction or reference-based estimate is given for the expected precursor line width, only a qualitative reference to Izotov et al. (2012). Since the same intermediate component is also used for the [OIII]/Hβ ratio, the reader should be able to check that the measured σ≈33–37 km/s for Hβ, [OIII], and HeII is consistent with a common precursor, rather than with an unrelated second photoionized component. A short quantitative comparison would materially strengthen the component attribution.
minor comments (5)
- [Abstract and §2] The abstract states R∼50,000 while §2.1 reports a measured resolution of 7.8–9.1 km/s (about R≈40,000). Please harmonize the resolving-power statement.
- [General] Typographical issues: 'histrograms' in the Figure 3 caption; 'Michgigan' in the second affiliation; 'CGCG 00-025' in §5.2 should read CGCG 007-025.
- [Fig. 6] The y-axis labels use 'HeII/H' and '[OIII]/H', but the text and caption refer to HeII/Hβ and [OIII]/Hβ. Use consistent notation.
- [Data availability] The data availability statement says the data are 'available in the article as tables.' It would be useful to state whether the reduced MIKE spectra will be deposited in a public archive, since the kinematic decomposition and the [NeV] limit would benefit from independent re-analysis.
- [Appendix A/B] The figure and table appendices are not numbered as separate items in the text; adding explicit references (e.g., 'Figure A1', 'Table B1') at first use would help the reader.
Circularity Check
No significant circularity: the shock interpretation is an external-model comparison against measured line ratios; self-citations are methodological and non-load-bearing.
full rationale
We find no circular derivation. The central claim—that HeII λ4686 in the brightest star-forming region originates from fast radiative shocks at 250–300 km/s—is an inference from measured emission-line ratios (HeII/Hβ=0.13±0.01, [OIII]/Hβ=6.3±0.3, and no [NeV] λ3426 detection) compared against the published, external MAPPINGS shock grid of Allen et al. (2008) in Sect. 5.4 and Fig. 6. The ratios are observed fluxes from Table B1; they are not fitted parameters, and the shock velocity is read from where the measured bands intersect the model curves, not solved from an equation that also defines the input. The kinematic attribution of HeII to the intermediate component is made on the measured line width (σ≈35 km/s versus σ_medium≈37 km/s; Sect. 4.1, Fig. 3) before any shock model is invoked. The only caveat is that the red-asymmetric excess of HeII (Sect. 4.1, Fig. 4) is not given a tabulated flux, so the numerator of the ratio rests on the assumption that the primary intermediate-width component carries the HeII flux used; this is a data-analysis robustness concern, not circularity, because it does not make the model output equivalent to the input. Self-citations (Fernández et al. 2018, 2019; Papers I and II) are used for the Bayesian abundance sampler, an ICF calibration, and comparison with MUSE data, but none is the load-bearing step for the shock conclusion; the abundance results are independently benchmarked against CLASSY/MODS (Arellano-Córdova et al. 2022a) and agree. No equation in the paper reduces to a fitted value or to an author-imported uniqueness condition.
Assumptions & free parameters
free parameters (5)
- T_low (low-ionisation zone temperature) =
15100 (+700/-500) K
- T_high (high-ionisation zone temperature) =
15900 (+500/-200) K
- n_e (electron density) =
250 (+60/-30) cm^-3
- c(Hbeta) extinction =
0.25 (+0.08/-0.07)
- Ionic abundances (O+, O2+, N+, S+, S2+, Ar2+, Ar3+, Ne2+, Fe2+, He+) =
see Table 3
assumptions (5)
- standard math Atomic data and emissivities used in the Bayesian sampler are correct
- domain assumption Two-zone ionisation model assumption
- domain assumption Allen et al. (2008) shock models with B=0.5 μG and grids at SMC, LMC, solar metallicities are applicable to this region
- domain assumption ICF calibrations from Fernández et al. (2018) (Eq. 2) and Amayo et al. (2021) are valid for this object
- domain assumption The HeII 4686 line is kinematically a single component belonging to the intermediate component family
Cite this review
Pith. "Pith review of Shocks and complex chemodynamics in the metal-poor starburst galaxy CGCG 007-025 revealed through high-resolution echelle spectroscopy." pith.science (2026). https://pith.science/paper/5SKQVNYC
@misc{pith2026250818160,
author = {Pith},
title = {Pith review of: Shocks and complex chemodynamics in the metal-poor starburst galaxy CGCG 007-025 revealed through high-resolution echelle spectroscopy},
year = {2026},
howpublished = {\url{https://pith.science/paper/5SKQVNYC}},
note = {Machine review of arXiv:2508.18160}
}
abstract
We use Magellan/MIKE echelle spectroscopy to conduct an in-depth chemodynamical analysis of the most luminous star-forming region within the metal-poor starburst dwarf galaxy CGCG 007-025. Leveraging the exceptional high resolution (R$\sim$50,000) and broad wavelength coverage, we apply Bayesian inference to simultaneously model the fluxes of 30 emission lines spanning the wavelength range 3400-9200\AA. Employing a two-region ionisation model, we characterise various gas properties including electron temperature, electron density, and chemical abundances across different elements. Our direct-method inferred metallicity yields $\rm 12+\log(O/H)=7.77\pm0.03$, placing the galaxy in the metal-poor regime. Furthermore, Metal-to-Oxygen ratios such as log(S/O), log(Ne/O) or log(Ar/O) are in full agreement with the values derived for the Milky Way, consistent with expectations from stellar evolutionary models. The brightest emission lines are kinematically complex, with modelling requiring up to four distinct components. The exceptional resolution and signal-to-noise ratio of the data unveil asymmetric and wide ($\sigma_{HeII} \approx$ 35km/s) HeII$\lambda$4686 emission. The flux ratio of this nebular line, together with the absence of other high ionisation species such as [NeV]$\lambda$3426, indicates the presence of fast radiative shocks. This dataset underscores the capability of echelle spectroscopy in delivering comprehensive chemodynamical analyses of starbursts in the Local Volume.
Figures
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Reference graph
Works this paper leans on
-
[1]
write newline
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-
[2]
Ahumada R., et al., 2020, @doi [ ] 10.3847/1538-4365/ab929e , https://ui.adsabs.harvard.edu/abs/2020ApJS..249....3A 249, 3
-
[3]
Alarie A., Morisset C., 2019, @doi [ ] 10.22201/ia.01851101p.2019.55.02.21 , https://ui.adsabs.harvard.edu/abs/2019RMxAA..55..377A 55, 377
-
[4]
Allen M. G., Groves B. A., Dopita M. A., Sutherland R. S., Kewley L. J., 2008, @doi [ ] 10.1086/589652 , https://ui.adsabs.harvard.edu/abs/2008ApJS..178...20A 178, 20
doi:10.1086/589652 2008
-
[5]
Amayo A., Delgado-Inglada G., Stasi \'n ska G., 2021, @doi [ ] 10.1093/mnras/stab1467 , https://ui.adsabs.harvard.edu/abs/2021MNRAS.505.2361A 505, 2361
-
[6]
O., P \'e rez-Montero E., V \' lchez J
Amor \' n R. O., P \'e rez-Montero E., V \' lchez J. M., 2010, @doi [ ] 10.1088/2041-8205/715/2/L128 , https://ui.adsabs.harvard.edu/abs/2010ApJ...715L.128A 715, L128
-
[7]
Amor \' n R., P \'e rez-Montero E., V \' lchez J. M., Papaderos P., 2012, @doi [ ] 10.1088/0004-637X/749/2/185 , https://ui.adsabs.harvard.edu/abs/2012ApJ...749..185A 749, 185
-
[8]
Z., Esteban C., Garc \' a-Rojas J., M \'e ndez-Delgado J
Arellano-C \'o rdova K. Z., Esteban C., Garc \' a-Rojas J., M \'e ndez-Delgado J. E., 2020, @doi [ ] 10.1093/mnras/staa1523 , https://ui.adsabs.harvard.edu/abs/2020MNRAS.496.1051A 496, 1051
Show all 99 references
-
[9]
Z., et al., 2022a, @doi [ ] 10.3847/1538-4357/ac7854 , https://ui.adsabs.harvard.edu/abs/2022ApJ...935...74A 935, 74
Arellano-C \'o rdova K. Z., et al., 2022a, @doi [ ] 10.3847/1538-4357/ac7854 , https://ui.adsabs.harvard.edu/abs/2022ApJ...935...74A 935, 74
-
[10]
Z., et al., 2022b, @doi [ ] 10.3847/2041-8213/ac9ab2 , https://ui.adsabs.harvard.edu/abs/2022ApJ...940L..23A 940, L23
Arellano-C \'o rdova K. Z., et al., 2022b, @doi [ ] 10.3847/2041-8213/ac9ab2 , https://ui.adsabs.harvard.edu/abs/2022ApJ...940L..23A 940, L23
-
[11]
Z., et al., 2024, @doi [ ] 10.3847/1538-4357/ad34cf , https://ui.adsabs.harvard.edu/abs/2024ApJ...968...98A 968, 98
Arellano-C \'o rdova K. Z., et al., 2024, @doi [ ] 10.3847/1538-4357/ad34cf , https://ui.adsabs.harvard.edu/abs/2024ApJ...968...98A 968, 98
2024 doi
-
[12]
Astropy Collaboration et al., 2013, @doi [ ] 10.1051/0004-6361/201322068 , https://ui.adsabs.harvard.edu/abs/2013A&A...558A..33A 558, A33
2013 doi
-
[13]
A., Erb D
Berg D. A., Erb D. K., Henry R. B. C., Skillman E. D., McQuinn K. B. W., 2019, @doi [ ] 10.3847/1538-4357/ab020a , https://ui.adsabs.harvard.edu/abs/2019ApJ...874...93B 874, 93
2019 doi
-
[14]
A., Chisholm J., Erb D
Berg D. A., Chisholm J., Erb D. K., Skillman E. D., Pogge R. W., Olivier G. M., 2021, @doi [ ] 10.3847/1538-4357/ac141b , https://ui.adsabs.harvard.edu/abs/2021ApJ...922..170B 922, 170
2021 doi
-
[15]
A., et al., 2022, @doi [ ] 10.3847/1538-4365/ac6c03 , https://ui.adsabs.harvard.edu/abs/2022ApJS..261...31B 261, 31
Berg D. A., et al., 2022, @doi [ ] 10.3847/1538-4365/ac6c03 , https://ui.adsabs.harvard.edu/abs/2022ApJS..261...31B 261, 31
2022 doi
-
[16]
A., Gunnels S
Bernstein R., Shectman S. A., Gunnels S. M., Mochnacki S., Athey A. E., 2003, in Iye M., Moorwood A. F. M., eds, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series Vol. 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescope...
2003 doi
-
[17]
D., Geha M
Bradford J. D., Geha M. C., Blanton M. R., 2015, @doi [ ] 10.1088/0004-637X/809/2/146 , https://ui.adsabs.harvard.edu/abs/2015ApJ...809..146B 809, 146
2015 doi
-
[18]
Brinchmann J., 2023, @doi [ ] 10.1093/mnras/stad1704 , https://ui.adsabs.harvard.edu/abs/2023MNRAS.525.2087B 525, 2087
2023 doi
-
[19]
J., et al., 2023, @doi [ ] 10.1051/0004-6361/202346107 , https://ui.adsabs.harvard.edu/abs/2023A&A...677A.115C 677, A115
Cameron A. J., et al., 2023, @doi [ ] 10.1051/0004-6361/202346107 , https://ui.adsabs.harvard.edu/abs/2023A&A...677A.115C 677, A115
2023 doi
-
[20]
M., Satyapal S., Abel N
Cann J. M., Satyapal S., Abel N. P., Ricci C., Secrest N. J., Blecha L., Gliozzi M., 2018, @doi [ ] 10.3847/1538-4357/aac64a , https://ui.adsabs.harvard.edu/abs/2018ApJ...861..142C 861, 142
2018 doi
-
[21]
Cardamone C., et al., 2009, @doi [ ] 10.1111/j.1365-2966.2009.15383.x , https://ui.adsabs.harvard.edu/abs/2009MNRAS.399.1191C 399, 1191
2009
-
[22]
V., Pogge R
Croxall K. V., Pogge R. W., Berg D. A., Skillman E. D., Moustakas J., 2015, @doi [ ] 10.1088/0004-637X/808/1/42 , https://ui.adsabs.harvard.edu/abs/2015ApJ...808...42C 808, 42
2015 doi
-
[23]
V., Pogge R
Croxall K. V., Pogge R. W., Berg D. A., Skillman E. D., Moustakas J., 2016, @doi [ ] 10.3847/0004-637X/830/1/4 , https://ui.adsabs.harvard.edu/abs/2016ApJ...830....4C 830, 4
2016 doi
- [24]
-
[25]
Curti M., et al., 2023b, @doi [ ] 10.1093/mnras/stac2737 , https://ui.adsabs.harvard.edu/abs/2023MNRAS.518..425C 518, 425
-
[26]
B., 2016, @doi [ ] 10.1051/0004-6361/201527895 , https://ui.adsabs.harvard.edu/abs/2016A&A...596A..97D 596, A97
De Cia A., Ledoux C., Mattsson L., Petitjean P., Srianand R., Gavignaud I., Jenkins E. B., 2016, @doi [ ] 10.1051/0004-6361/201527895 , https://ui.adsabs.harvard.edu/abs/2016A&A...596A..97D 596, A97
2016 doi
-
[27]
J., Liske J., Driver S
De Propris R., Conselice C. J., Liske J., Driver S. P., Patton D. R., Graham A. W., Allen P. D., 2007, @doi [ ] 10.1086/520488 , https://ui.adsabs.harvard.edu/abs/2007ApJ...666..212D 666, 212
2007 doi
-
[28]
I., Zamora S., 2022, @doi [ ] 10.1093/mnras/stac387 , https://ui.adsabs.harvard.edu/abs/2022MNRAS.511.4377D 511, 4377
D \' az \'A . I., Zamora S., 2022, @doi [ ] 10.1093/mnras/stac387 , https://ui.adsabs.harvard.edu/abs/2022MNRAS.511.4377D 511, 4377
2022 doi
-
[29]
Dom \' nguez-Guzm \'a n G., Rodr \' guez M., Garc \' a-Rojas J., Esteban C., Toribio San Cipriano L., 2022, @doi [ ] 10.1093/mnras/stac2974 , https://ui.adsabs.harvard.edu/abs/2022MNRAS.517.4497D 517, 4497
2022 doi
-
[30]
T., 2011, Physics of the Interstellar and Intergalactic Medium
Draine B. T., 2011, Physics of the Interstellar and Intergalactic Medium
2011
-
[31]
Feltre A., Charlot S., Gutkin J., 2016, @doi [ ] 10.1093/mnras/stv2794 , https://ui.adsabs.harvard.edu/abs/2016MNRAS.456.3354F 456, 3354
2016 doi
-
[32]
I., Terlevich R., Rosales-Ortega F
Fern \'a ndez V., Terlevich E., D \' az A. I., Terlevich R., Rosales-Ortega F. F., 2018, @doi [ ] 10.1093/mnras/sty1206 , https://ui.adsabs.harvard.edu/abs/2018MNRAS.478.5301F 478, 5301
2018 doi
-
[33]
I., Terlevich R., 2019, @doi [ ] 10.1093/mnras/stz1433 , https://ui.adsabs.harvard.edu/abs/2019MNRAS.487.3221F 487, 3221
Fern \'a ndez V., Terlevich E., D \' az A. I., Terlevich R., 2019, @doi [ ] 10.1093/mnras/stz1433 , https://ui.adsabs.harvard.edu/abs/2019MNRAS.487.3221F 487, 3221
2019 doi
-
[34]
M., 2022, @doi [ ] 10.1093/mnras/stab3150 , https://ui.adsabs.harvard.edu/abs/2022MNRAS.511.2515F 511, 2515
Fern \'a ndez V., Amor \' n R., P \'e rez-Montero E., Papaderos P., Kehrig C., V \' lchez J. M., 2022, @doi [ ] 10.1093/mnras/stab3150 , https://ui.adsabs.harvard.edu/abs/2022MNRAS.511.2515F 511, 2515
2022 doi
-
[35]
G., Papaderos P., 2023, @doi [ ] 10.1093/mnras/stad198 , https://ui.adsabs.harvard.edu/abs/2023MNRAS.520.3576F 520, 3576
Fern \'a ndez V., Amor \' n R., Sanchez-Janssen R., del Valle-Espinosa M. G., Papaderos P., 2023, @doi [ ] 10.1093/mnras/stad198 , https://ui.adsabs.harvard.edu/abs/2023MNRAS.520.3576F 520, 3576
2023 doi
-
[36]
G., Izotov Y
Guseva N. G., Izotov Y. I., Stasi \'n ska G., Fricke K. J., Henkel C., Papaderos P., 2011, @doi [ ] 10.1051/0004-6361/201016291 , https://ui.adsabs.harvard.edu/abs/2011A&A...529A.149G 529, A149
2011 doi
-
[37]
Gutkin J., Charlot S., Bruzual G., 2016, @doi [ ] 10.1093/mnras/stw1716 , https://ui.adsabs.harvard.edu/abs/2016MNRAS.462.1757G 462, 1757
2016 doi
-
[38]
B., Heathcote S
Hamuy M., Suntzeff N. B., Heathcote S. R., Walker A. R., Gigoux P., Phillips M. M., 1994, @doi [ ] 10.1086/133417 , https://ui.adsabs.harvard.edu/abs/1994PASP..106..566H 106, 566
1994 doi
-
[39]
Haridas Nair P., 2016, Lineid Plot , Zenodo, @doi 10.5281/zenodo.1069584
2016 doi
-
[40]
C., Hopkins P
Hayward C. C., Hopkins P. F., 2017, @doi [ ] 10.1093/mnras/stw2888 , https://ui.adsabs.harvard.edu/abs/2017MNRAS.465.1682H 465, 1682
2017 doi
-
[41]
C., Micheva G., Weilbacher P
Herenz E. C., Micheva G., Weilbacher P. M., Monreal-Ibero A., Hayes M., Anders F., Rivinius T., 2023, @doi [Research Notes of the American Astronomical Society] 10.3847/2515-5172/acd69e , https://ui.adsabs.harvard.edu/abs/2023RNAAS...7...99H 7, 99
2023 doi
-
[42]
D., 2007, @doi [Computing in Science and Engineering] 10.1109/MCSE.2007.55 , https://ui.adsabs.harvard.edu/abs/2007CSE.....9...90H 9, 90
Hunter J. D., 2007, @doi [Computing in Science and Engineering] 10.1109/MCSE.2007.55 , https://ui.adsabs.harvard.edu/abs/2007CSE.....9...90H 9, 90
2007 doi
-
[43]
Isobe Y., et al., 2023, @doi [ ] 10.3847/1538-4357/ad09be , https://ui.adsabs.harvard.edu/abs/2023ApJ...959..100I 959, 100
2023 doi
-
[44]
I., Thuan T
Izotov Y. I., Thuan T. X., 1999, @doi [ ] 10.1086/306708 , https://ui.adsabs.harvard.edu/abs/1999ApJ...511..639I 511, 639
1999 doi
-
[45]
I., Stasi \'n ska G., Meynet G., Guseva N
Izotov Y. I., Stasi \'n ska G., Meynet G., Guseva N. G., Thuan T. X., 2006, @doi [ ] 10.1051/0004-6361:20053763 , https://ui.adsabs.harvard.edu/abs/2006A&A...448..955I 448, 955
2006 doi
-
[47]
I., Guseva N
Izotov Y. I., Guseva N. G., Fricke K. J., Henkel C., Schaerer D., Thuan T. X., 2021, @doi [ ] 10.1051/0004-6361/202039772 , https://ui.adsabs.harvard.edu/abs/2021A&A...646A.138I 646, A138
2021 doi
-
[48]
M., P \'e rez-Montero E., Iglesias-P \'a ramo J., Brinchmann J., Kunth D., Durret F., Bayo F
Kehrig C., V \' lchez J. M., P \'e rez-Montero E., Iglesias-P \'a ramo J., Brinchmann J., Kunth D., Durret F., Bayo F. M., 2015, @doi [ ] 10.1088/2041-8205/801/2/L28 , https://ui.adsabs.harvard.edu/abs/2015ApJ...801L..28K 801, L28
2015 doi
-
[49]
M., Guerrero M
Kehrig C., V \' lchez J. M., Guerrero M. A., Iglesias-P \'a ramo J., Hunt L. K., Duarte-Puertas S., Ramos-Larios G., 2018, @doi [ ] 10.1093/mnras/sty1920 , https://ui.adsabs.harvard.edu/abs/2018MNRAS.480.1081K 480, 1081
2018 doi
-
[50]
D., 2003, @doi [ ] 10.1086/375502 , https://ui.adsabs.harvard.edu/abs/2003PASP..115..688K 115, 688
Kelson D. D., 2003, @doi [ ] 10.1086/375502 , https://ui.adsabs.harvard.edu/abs/2003PASP..115..688K 115, 688
2003 doi
-
[51]
D., Illingworth G
Kelson D. D., Illingworth G. D., van Dokkum P. G., Franx M., 2000, @doi [ ] 10.1086/308445 , https://ui.adsabs.harvard.edu/abs/2000ApJ...531..159K 531, 159
2000 doi
-
[52]
Y., Pustilnik S
Kniazev A. Y., Pustilnik S. A., Grebel E. K., Lee H., Pramskij A. G., 2004, @doi [ ] 10.1086/421519 , https://ui.adsabs.harvard.edu/abs/2004ApJS..153..429K 153, 429
2004 doi
-
[53]
Kourkchi E., et al., 2020, @doi [ ] 10.3847/1538-4357/abb66b , https://ui.adsabs.harvard.edu/abs/2020ApJ...902..145K 902, 145
2020 doi
-
[54]
Lecroq M., et al., 2024, @doi [ ] 10.1093/mnras/stad3838 , https://ui.adsabs.harvard.edu/abs/2024MNRAS.527.9480L 527, 9480
2024 doi
- [55]
-
[56]
Luo W., Yang X., Zhang Y., 2014, @doi [ ] 10.1088/2041-8205/789/1/L16 , https://ui.adsabs.harvard.edu/abs/2014ApJ...789L..16L 789, L16
2014 doi
-
[57]
arXiv:2209.02726
Marasco A., et al., 2022, arXiv e-prints, https://ui.adsabs.harvard.edu/abs/2022arXiv220902726M p. arXiv:2209.02726
2022 arXiv
-
[58]
Mignoli M., et al., 2013, @doi [ ] 10.1051/0004-6361/201220846 , https://ui.adsabs.harvard.edu/abs/2013A&A...556A..29M 556, A29
2013 doi
-
[59]
Mingozzi M., et al., 2022, @doi [ ] 10.3847/1538-4357/ac952c , https://ui.adsabs.harvard.edu/abs/2022ApJ...939..110M 939, 110
2022 doi
-
[60]
E., Hidalgo-G \'a mez A
Miranda-P \'e rez B. E., Hidalgo-G \'a mez A. M., 2023, @doi [ ] 10.3847/1538-4357/acdb4b , https://ui.adsabs.harvard.edu/abs/2023ApJ...952...76M 952, 76
2023 doi
-
[61]
E., Latimer L
Molina M., Reines A. E., Latimer L. J., Baldassare V., Salehirad S., 2021, @doi [ ] 10.3847/1538-4357/ac1ffa , https://ui.adsabs.harvard.edu/abs/2021ApJ...922..155M 922, 155
2021 doi
-
[62]
L., Kere s D., Faucher-Gigu \`e re C.-A., Hopkins P
Muratov A. L., Kere s D., Faucher-Gigu \`e re C.-A., Hopkins P. F., Quataert E., Murray N., 2015, @doi [ ] 10.1093/mnras/stv2126 , https://ui.adsabs.harvard.edu/abs/2015MNRAS.454.2691M 454, 2691
2015 doi
- [63]
-
[64]
Newville M., Stensitzki T., Allen D. B., Rawlik M., Ingargiola A., Nelson A., 2016, Lmfit: Non-Linear Least-Square Minimization and Curve-Fitting for Python , Astrophysics Source Code Library, record ascl:1606.014 ( @eprint ascl 1606.014 )
2016
-
[65]
M., Berg D
Olivier G. M., Berg D. A., Chisholm J., Erb D. K., Pogge R. W., Skillman E. D., 2022, @doi [ ] 10.3847/1538-4357/ac8f2c , https://ui.adsabs.harvard.edu/abs/2022ApJ...938...16O 938, 16
2022 doi
-
[66]
E., Ferland G
Osterbrock D. E., Ferland G. J., 2006, Astrophysics of gaseous nebulae and active galactic nuclei
2006
-
[67]
Pagel B. E. J., Edmunds M. G., Fosbury R. A. E., Webster B. L., 1978, @doi [ ] 10.1093/mnras/184.3.569 , https://ui.adsabs.harvard.edu/abs/1978MNRAS.184..569P 184, 569
1978 doi
-
[68]
Papaderos P., \"O stlin G., 2012, @doi [ ] 10.1051/0004-6361/201117551 , https://ui.adsabs.harvard.edu/abs/2012A&A...537A.126P 537, A126
2012 doi
-
[69]
C., 2020, @doi [ ] 10.1146/annurev-astro-021820-120014 , https://ui.adsabs.harvard.edu/abs/2020ARA&A..58..363P 58, 363
P \'e roux C., Howk J. C., 2020, @doi [ ] 10.1146/annurev-astro-021820-120014 , https://ui.adsabs.harvard.edu/abs/2020ARA&A..58..363P 58, 363
2020 doi
-
[70]
Plat A., Charlot S., Bruzual G., Feltre A., Vidal-Garc \' a A., Morisset C., Chevallard J., Todt H., 2019, @doi [ ] 10.1093/mnras/stz2616 , https://ui.adsabs.harvard.edu/abs/2019MNRAS.490..978P 490, 978
2019 doi
-
[71]
Reefe M., et al., 2023, @doi [ ] 10.3847/2041-8213/acb4e4 , https://ui.adsabs.harvard.edu/abs/2023ApJ...946L..38R 946, L38
2023 doi
-
[72]
H., 2005, @doi [ ] 10.1086/429958 , https://ui.adsabs.harvard.edu/abs/2005ApJ...626..900R 626, 900
Rodr \' guez M., Rubin R. H., 2005, @doi [ ] 10.1086/429958 , https://ui.adsabs.harvard.edu/abs/2005ApJ...626..900R 626, 900
2005 doi
-
[73]
Rogers N. S. J., Skillman E. D., Pogge R. W., Berg D. A., Croxall K. V., Bartlett J., Arellano-C \'o rdova K. Z., Moustakas J., 2022, @doi [ ] 10.3847/1538-4357/ac947d , https://ui.adsabs.harvard.edu/abs/2022ApJ...939...44R 939, 44
2022 doi
-
[74]
Roman-Duval J., et al., 2021, @doi [ ] 10.3847/1538-4357/abdeb6 , https://ui.adsabs.harvard.edu/abs/2021ApJ...910...95R 910, 95
2021 doi
-
[75]
B., Mu \ n oz-Tu \ n \'o n C., Garc \' a-Benito R., Nuza S
S \'a nchez Almeida J., P \'e rez-Montero E., Morales-Luis A. B., Mu \ n oz-Tu \ n \'o n C., Garc \' a-Benito R., Nuza S. E., Kitaura F. S., 2016, @doi [ ] 10.3847/0004-637X/819/2/110 , https://ui.adsabs.harvard.edu/abs/2016ApJ...819..110S 819, 110
2016 doi
-
[76]
L., et al., 2021, @doi [ ] 10.3847/1538-4357/abf4c1 , https://ui.adsabs.harvard.edu/abs/2021ApJ...914...19S 914, 19
Sanders R. L., et al., 2021, @doi [ ] 10.3847/1538-4357/abf4c1 , https://ui.adsabs.harvard.edu/abs/2021ApJ...914...19S 914, 19
2021 doi
- [77]
-
[78]
D., Sembach K
Savage B. D., Sembach K. R., 1996, @doi [ ] 10.1086/177919 , https://ui.adsabs.harvard.edu/abs/1996ApJ...470..893S 470, 893
1996 doi
-
[79]
Schaerer D., 1996, @doi [ ] 10.1086/310193 , https://ui.adsabs.harvard.edu/abs/1996ApJ...467L..17S 467, L17
1996 doi
-
[80]
I., 2019, @doi [ ] 10.1051/0004-6361/201935005 , https://ui.adsabs.harvard.edu/abs/2019A&A...622L..10S 622, L10
Schaerer D., Fragos T., Izotov Y. I., 2019, @doi [ ] 10.1051/0004-6361/201935005 , https://ui.adsabs.harvard.edu/abs/2019A&A...622L..10S 622, L10
2019 doi
-
[81]
I., Naidu R., Guseva N
Schaerer D., Marques-Chaves R., Barrufet L., Oesch P., Izotov Y. I., Naidu R., Guseva N. G., Brammer G., 2022, @doi [ ] 10.1051/0004-6361/202244556 , https://ui.adsabs.harvard.edu/abs/2022A&A...665L...4S 665, L4
2022 doi
-
[82]
Senchyna P., et al., 2017, @doi [ ] 10.1093/mnras/stx2059 , https://ui.adsabs.harvard.edu/abs/2017MNRAS.472.2608S 472, 2608
2017 doi
-
[83]
P., Chevallard J., Charlot S., Jones T., Vidal-Garc \' a A., 2019, @doi [ ] 10.1093/mnras/stz1907 , https://ui.adsabs.harvard.edu/abs/2019MNRAS.488.3492S 488, 3492
Senchyna P., Stark D. P., Chevallard J., Charlot S., Jones T., Vidal-Garc \' a A., 2019, @doi [ ] 10.1093/mnras/stz1907 , https://ui.adsabs.harvard.edu/abs/2019MNRAS.488.3492S 488, 3492
2019 doi
-
[84]
P., Mirocha J., Reines A
Senchyna P., Stark D. P., Mirocha J., Reines A. E., Charlot S., Jones T., Mulchaey J. S., 2020, @doi [ ] 10.1093/mnras/staa586 , https://ui.adsabs.harvard.edu/abs/2020MNRAS.494..941S 494, 941
2020 doi
-
[85]
Senchyna P., et al., 2022, @doi [ ] 10.3847/1538-4357/ac5d38 , https://ui.adsabs.harvard.edu/abs/2022ApJ...930..105S 930, 105
2022 doi
-
[86]
Shirazi M., Brinchmann J., 2012, @doi [ ] 10.1111/j.1365-2966.2012.20439.x , https://ui.adsabs.harvard.edu/abs/2012MNRAS.421.1043S 421, 1043
2012
-
[87]
Simmonds C., Schaerer D., Verhamme A., 2021, @doi [ ] 10.1051/0004-6361/202141856 , https://ui.adsabs.harvard.edu/abs/2021A&A...656A.127S 656, A127
2021 doi
-
[88]
J., Cardelli J
Sofia U. J., Cardelli J. A., Savage B. D., 1994, @doi [ ] 10.1086/174438 , https://ui.adsabs.harvard.edu/abs/1994ApJ...430..650S 430, 650
1994 doi
-
[89]
Stasi \'n ska G., Izotov Y., Morisset C., Guseva N., 2015, @doi [ ] 10.1051/0004-6361/201425389 , https://ui.adsabs.harvard.edu/abs/2015A&A...576A..83S 576, A83
2015 doi
-
[90]
C., 1994, @doi [ ] 10.1093/mnras/267.4.904 , https://ui.adsabs.harvard.edu/abs/1994MNRAS.267..904S 267, 904
Stevenson C. C., 1994, @doi [ ] 10.1093/mnras/267.4.904 , https://ui.adsabs.harvard.edu/abs/1994MNRAS.267..904S 267, 904
1994 doi
-
[91]
Trebitsch M., Blaizot J., Rosdahl J., Devriendt J., Slyz A., 2017, @doi [ ] 10.1093/mnras/stx1060 , https://ui.adsabs.harvard.edu/abs/2017MNRAS.470..224T 470, 224
2017 doi
-
[92]
A., et al., 2004, @doi [ ] 10.1086/423264 , https://ui.adsabs.harvard.edu/abs/2004ApJ...613..898T 613, 898
Tremonti C. A., et al., 2004, @doi [ ] 10.1086/423264 , https://ui.adsabs.harvard.edu/abs/2004ApJ...613..898T 613, 898
2004 doi
-
[93]
R., et al., 2023, @doi [ ] 10.3847/1538-4357/acba8a , https://ui.adsabs.harvard.edu/abs/2023ApJ...945...35T 945, 35
Trump J. R., et al., 2023, @doi [ ] 10.3847/1538-4357/acba8a , https://ui.adsabs.harvard.edu/abs/2023ApJ...945...35T 945, 35
2023 doi
-
[94]
Watanabe K., et al., 2024, @doi [ ] 10.3847/1538-4357/ad13ff , https://ui.adsabs.harvard.edu/abs/2024ApJ...962...50W 962, 50
2024 doi
-
[95]
R., et al., 2011, @doi [ ] 10.1088/0004-637X/739/1/5 , https://ui.adsabs.harvard.edu/abs/2011ApJ...739....5W 739, 5
Weisz D. R., et al., 2011, @doi [ ] 10.1088/0004-637X/739/1/5 , https://ui.adsabs.harvard.edu/abs/2011ApJ...739....5W 739, 5
2011 doi
-
[96]
Yang H., et al., 2017a, @doi [ ] 10.3847/1538-4357/aa7d4d , https://ui.adsabs.harvard.edu/abs/2017ApJ...844..171Y 844, 171
-
[97]
E., Wang J., 2017b, @doi [ ] 10.3847/1538-4357/aa8809 , https://ui.adsabs.harvard.edu/abs/2017ApJ...847...38Y 847, 38
Yang H., Malhotra S., Rhoads J. E., Wang J., 2017b, @doi [ ] 10.3847/1538-4357/aa8809 , https://ui.adsabs.harvard.edu/abs/2017ApJ...847...38Y 847, 38
-
[98]
T., 1968, ``Catalogue of Galaxies and of Clusters of Galaxies'', Volume VI
Zwicky F., Kowal C. T., 1968, ``Catalogue of Galaxies and of Clusters of Galaxies'', Volume VI
1968
-
[99]
del Valle-Espinosa M. G., S \'a nchez-Janssen R., Amor \' n R., Fern \'a ndez V., S \'a nchez Almeida J., Garc \' a Lorenzo B., Papaderos P., 2023, @doi [ ] 10.1093/mnras/stad1087 , https://ui.adsabs.harvard.edu/abs/2023MNRAS.522.2089D 522, 2089
2023 doi
-
[100]
C., Varoquaux G., 2011, @doi [Computing in Science and Engineering] 10.1109/MCSE.2011.37 , https://ui.adsabs.harvard.edu/abs/2011CSE....13b..22V 13, 22
van der Walt S., Colbert S. C., Varoquaux G., 2011, @doi [Computing in Science and Engineering] 10.1109/MCSE.2011.37 , https://ui.adsabs.harvard.edu/abs/2011CSE....13b..22V 13, 22
2011 doi
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