REVIEW 3 major objections 4 minor 1 cited by
GNHeII J1236+6215: A He II $\lambda$1640 emitting and potentially LyC leaking galaxy at $z$ = 2.9803 unveiled through JWST & Keck observations
T0 review · 3 major / 4 minor · reviewed 2026-08-07 · deepseek-v4-flash
Pith's one-line read A z=3 galaxy's He II glow points to Population III stars. The discovery of narrow helium emission and an ISM built to leak ionizing photons adds a rare object to the small sample of high-redshift He II emitters.
desk verdict A careful, honest discovery paper for a new z≈3 He II emitter, but the key line rests on a private Keck spectrum that JWST does not independently confirm; worth a real referee who pushes for the data and a quantitative treatment of the prism non-detection. 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 central object is the He II λ1640 recombination line, which requires photons with E>54.4 eV (λ<228 Å), and the set of diagnostic line ratios (He II/Hβ, He II/Hα, O32, [S III]/[S II], [S II]/Hα, [O III]/Hβ) that separate candidate ionizing sources. The argument also leans on the [S II] deficiency parameter Δ[SII] as a tracer of density-bounded H II regions, and on SED fitting with CIGALE (BC03 stellar populations, Chabrier IMF) to derive stellar mass, SFR, and ionization parameter log U=−2.0.
What would settle it
A deep JWST NIRSpec grating observation of the He II λ1640 line and the rest-frame UV: if the line shows a broad component (FWHM≳1000 km/s) or a velocity offset from the Balmer lines, or if C IV λ1549 or N V λ1240 appear with P-Cygni profiles, the Pop III/VMS interpretation would be contradicted in favor of WR winds or an AGN. A 5σ detection of LyC flux in the F275W band would confirm escape, while a similarly deep non-detection would weaken the LyC-leaker claim.
Extended reading notes
Core claim
GNHeII J1236+6215 at z=2.9803 is a low-mass (M=7.8±3.1×$10^{8}$ M⊙), metal-poor (12+log(O/H)=7.85±0.22), low-dust (E(B−V)=0.04±0.12) star-forming galaxy with a narrow He II λ1640 line (observed FWHM=573±191 km/s, rest-frame EW=8.3 Å, L=9.55±1.95×$10^{41}$ erg/s) and three additional helium lines (He I λ5875, He I λ10830, He II λ8236). The absence of C IV λ1549, N V λ1240, and X-ray emission, together with narrow Balmer lines, rules out AGN and metal-rich Wolf-Rayet stars; the line ratios (He II/Hβ=1.96±0.30, He II/Hα=0.69±0.10, O32=7.28±0.11) place the galaxy in the Pop III/VMS region of diagnostic diagrams. The galaxy also shows [S II] deficiency ([SII]/Hα=0.08±0.02, Δ[SII]=−0.12) and an optically thin, density-bounded ISM that favors LyC escape, with a compact effective radius <0.31 kpc and SFR surface density ~41.5 M⊙ yr−1 kpc−2.
Load-bearing premise
The SED grid assumes the galaxy's light comes from standard BC03 stellar populations with a Chabrier IMF; it does not include Population III or very massive stars, so if those power the He II line the derived mass, SFR, and ionization parameter are biased.
Editorial extensions
If this is right
- Adds a new object to the known sample of He II emitters at z≈2–5, one of the most UV-luminous (M_UV=−22.09) and among the strongest He II emitters at z≈3.
- Shows that narrow He II profiles (FWHM<1000 km/s) can be produced by Pop III pockets or metal-poor very massive stars even in a galaxy whose bulk metallicity is ~15% solar.
- Identifies the galaxy as a potential LyC leaker at z≈3, with multiple independent ISM indicators favoring escape: low dust, high O32, [S II] deficiency, compact morphology, and a near-symmetric Lyα profile.
- If LyC escape is confirmed, this object supports the idea that He II emitters are relevant to reionization, connecting extreme ionizing sources with the conditions that let ionizing photons out.
- Demonstrates JWST NIRCam's ability to deblend a foreground galaxy that contaminated earlier HST-based photometry and LyC measurements of this line of sight.
Reading between the lines
- The systematic flux offset between Keck and NIRSpec spectra (~2×) noted by the authors means the absolute He II luminosity and EW could change by a similar factor; a recalibrated spectrum would test whether the object remains among the strongest emitters.
- The co-location of hard-ionizing He II production and LyC-favorable ISM conditions in one compact galaxy raises a testable hypothesis: that the same young massive stellar pockets provide both the hard ionizing spectrum and, through feedback, the density-bounded geometry that lets LyC photons escape; a NIRSpec IFU observation could spatially separate the Pop III-like region from the rest of the gal
- Deeper F275W or AstroSat UVIT observations reaching a 5σ detection of LyC flux would yield a direct escape-fraction measurement; the paper's current upper limit is f_esc=0.19, so a robust detection would require a substantial exposure gain.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper reports the discovery of GNHeII J1236+6215, a z=2.9803 star-forming galaxy in GOODS-North, using Keck LRIS, Keck MOSFIRE, JWST NIRSpec, and 17-band HST/JWST photometry. The central observational claim is a narrow He II λ1640 line (observed FWHM 573±191 km/s, rest-frame EW 8.3 Å, luminosity 9.55±1.95×10^41 erg/s) detected only in the LRIS spectrum. Combined with NIRSpec spectroscopy, the authors identify 15 emission lines and infer a low-mass, low-metallicity, highly ionized ISM (O32=7.28, [SIII]/[SII]=1.97, E(B-V)=0.04). They argue that He+ ionization is most plausibly powered by pockets of Population III stars or metal-poor very massive stars, rather than by AGN or metal-rich Wolf-Rayet stars, and that the ISM conditions ([SII]/Hα=0.08, symmetric Lyα, compact size, low dust) favor Lyman-continuum leakage. The paper includes a careful redshift/source-attribution exercise and a quantitative treatment of systematic flux offsets between instruments.
Significance. If the He II detection is secure, this is a valuable addition to the small sample of high-redshift He II λ1640 emitters and a rare case where extreme ionizing sources and LyC-leakage indicators are found in the same object, with implications for reionization studies. The paper is thorough in using all available data: 15 emission lines, 17-band SED fitting, a 2D NIRSpec spatial analysis, an explicit search for alternative redshift solutions, and a transparent Appendix D quantifying Keck/NIRSpec flux offsets. The authors also state clear caveats about the non-detection in the prism spectrum and the uncertain F275W photometry. However, the scientific impact is conditional on the robustness of the single He II line, which currently rests on a private LRIS spectrum and is not independently confirmed by JWST.
major comments (3)
- [§2, §6.1, Table 4] The central discovery—He II λ1640 emission—is detected only in the Keck LRIS spectrum, which was acquired through private communication and is not publicly available. The JWST NIRSpec prism covers the expected observed wavelength, but the authors report that they could not confirm a clean detection and derive a 1σ upper limit of ~1.6×10^-18 erg s^-1 cm^-2 (Section 6.1), about 5.5 times lower than the reported LRIS flux of 8.8±1.8×10^-18 erg s^-1 cm^-2. This is a load-bearing discrepancy: if the LRIS line is real, the prism data should show it at high significance unless the line is severely diluted by the prism's low spectral resolution near 0.65 μm. The paper asserts this dilution qualitatively but does not present the expected prism line profile or the resulting expected signal-to-noise ratio. I request (i) a quantitative consistency check that includes the line spread over the prism resolution element and the noise per resolution element at that wavelength, and (ii) that the LRIS 1D and 2D spectra, or at least a fully reduced version, be made public or available to the referee during the revision.
- [§6.2] The LRIS line fluxes have no associated error spectrum; the errors are estimated from the standard deviation of five adjacent flux values at each wavelength. This procedure can underestimate correlated noise, sky-subtraction residuals, and slit-loss variations, and it is the only uncertainty estimate for the He II λ1640 flux and FWHM that drive the entire analysis. Please provide a more robust error estimate, for example using the 2D spectrum with row-by-row variance or a bootstrap over independent spectral rows, and report how the significance of He II λ1640 changes with this error treatment.
- [§5, Table 3] The CIGALE SED grid uses only BC03 stellar population models with a Chabrier IMF and metallicities Z=0.004 and 0.008; it does not include Population III stars or very massive stars. The paper nevertheless uses the derived stellar mass (7.8×10^8 M⊙), SFR (12.2 M⊙/yr), burst age (5 Myr), and log U=-2.0 as quantitative inputs to the discussion of He+ ionization and LyC escape in Sections 7.3 and 7.4. As the authors themselves note when citing Schaerer et al. (2025), the inclusion of VMSs can change the inferred UV luminosity by factors of 5–6, which would bias the SED-derived SFR and mass if VMSs are present. A VMS- or Pop III-inclusive SED fit, or a quantitative estimate of the systematic error from excluding such populations, is needed before these values can be used to support the central interpretation.
minor comments (4)
- [§7.2, Table 4] Section 7.2 states that the detection of He II λ8236 'reinforces the presence of an extreme ionizing source', but Table 4 does not list a flux, FWHM, or equivalent width for this line. Please provide the measurement or explicitly state it as an upper limit.
- [§7.4, Table 2] The F275W magnitude of G1 is listed as 29.313±2.161, which is formally a marginal or non-detection; Section 7.4 nevertheless uses this flux to derive an fesc upper limit of 0.19. Please mark F275W as an upper limit in Table 2 and compute the fesc limit consistently with the photometric error.
- [Appendix C] Appendix C states that the contribution from the lower half of the MSA shutter cannot be entirely ruled out and that G2 could be at the same redshift as G1, which is confusing given the z=0.55 photometric redshift adopted for G2 in Section 4. Please clarify what constraints the 2D spectra actually place on G2's redshift and contribution.
- [§6.2, Table 4] The NIRSpec grating fluxes are systematically lower than the Keck MOSFIRE [OIII] fluxes by about a factor of two, and the paper uses different instruments for different line ratios. Please state explicitly in Table 4 or in the text which spectrum is used for each diagnostic ratio, so that the reader can assess the impact of the flux offset.
Circularity Check
No significant circularity: the He II measurement and the Pop III/VMS interpretation rest on direct spectra and external model grids, not on fitted inputs or load-bearing self-citations.
full rationale
The paper's central discovery is a spectroscopic line measurement: He II lambda1640 is detected in the Keck LRIS spectrum with a flux of 8.8±1.8e-18 erg s^-1 cm^-2, and all downstream inferences (line width, EW, luminosity, line ratios) are derived directly from that measurement and the JWST spectra. The Pop III / very massive star interpretation is tested against externally published diagnostic grids (Schaerer 2002; Katz et al. 2023; Wang et al. 2024), and the paper explicitly notes that the high [OIII]/Hbeta ratio and gas-phase metallicity disfavor pristine Pop III conditions, so the conclusion is an interpretation of measured ratios rather than a forced fit. The SED modeling does use emission-line-derived E(B-V) and metallicity as CIGALE priors, but this couples the priors to the SED fit without making the SED predict the He II line or the Pop III classification; the derived stellar mass, SFR, and log U are not circularly defined by the He II measurement. The self-citations (Saha et al. 2020 for the fesc relation; Mondal et al. 2023a,b for UVIT and GOODS-N context) are empirical external results or are explicitly described as unreliable for the present object's LyC measurement, and none of them is the load-bearing justification for the paper's central claim. The non-detection of He II in the JWST prism spectrum is a sensitivity and resolution limitation that the authors quantify with a 1-sigma upper limit; it is a robustness concern, not a circularity, because the detection is not defined in terms of the model conclusions. Overall, the derivation chain is self-contained against external benchmarks and no step reduces by construction to its own inputs.
Assumptions & free parameters
free parameters (4)
- CIGALE burst age =
5 Myr (best-fit)
- CIGALE stellar population age and SFH timescales (age, tau_main, tau_burst, fburst) =
not individually reported; grid values in Table 3
- Nebular ionization parameter log U =
-2.0 (best-fit)
- E(B-V) line and ZGas priors =
E(B-V)=0.04, Z~0.003
assumptions (5)
- domain assumption The emission lines detected across Keck and JWST spectra originate from galaxy G1 at z=2.9803 and not from the foreground galaxy G2.
- domain assumption Standard stellar population synthesis models (BC03 with Chabrier IMF) can represent the galaxy's continuum.
- domain assumption The empirical line-ratio diagnostics (S23, R23, O32, [SII] deficiency, FWHM thresholds) calibrated on local and simulated galaxies apply at z~3.
- domain assumption The He II 1640 line is nebular and its narrow FWHM excludes significant AGN or Wolf-Rayet contribution.
- domain assumption The F275W band probes rest-frame LyC with negligible red-leak, and the Saha et al. (2020) relation gives a valid fesc upper limit.
Cite this review
Pith. "Pith review of GNHeII J1236+6215: A He II $\lambda$1640 emitting and potentially LyC leaking galaxy at $z$ = 2.9803 unveiled through JWST & Keck observations." pith.science (2026). https://pith.science/paper/4CNAA6XU
@misc{pith2026250606831,
author = {Pith},
title = {Pith review of: GNHeII J1236+6215: A He II $\lambda$1640 emitting and potentially LyC leaking galaxy at $z$ = 2.9803 unveiled through JWST & Keck observations},
year = {2026},
howpublished = {\url{https://pith.science/paper/4CNAA6XU}},
note = {Machine review of arXiv:2506.06831}
}
abstract
He II $\lambda$1640 emission in galaxies indicates the presence of sources that produce extreme ionizing photons. Here, we report the discovery of a He II $\lambda$1640 emitting galaxy, GNHeII J1236+6215, at $z=$ 2.9803 in the GOODS-north field. We use photometry in 17 wavebands from near-UV to infrared to characterize the galaxy SED and combine Keck LRIS and JWST NIRSpec spectra to identify 15 emission lines including He II $\lambda$1640. We infer that the He$^+$ ionization in the galaxy could be driven by small pockets of young Population III stars or low-metallicity Very Massive Stars (VMSs) rather than AGN or metal-rich Wolf-Rayet stars. The galaxy has a highly ionized ISM ([OIII]5007/[OII]3727 = 7.28$\pm$0.11, [SIII]/[SII] = 1.97$\pm$0.48 and detected Ly$\alpha$, H$\alpha$, H$\beta$, H$\gamma$ lines), little reddening by dust (E(B$-$V) = 0.04$\pm$0.12), low metallicity (12 + log(O/H) = 7.85$\pm$0.22), and high star formation rate (SFR$_{\rm SED}$ = 12.2$\pm$2.0 M$_{\odot}$ yr$^{-1}$). In addition to these ISM conditions, we also notice a significant [SII] deficiency ([SII]6718,6732/H$\alpha$ = 0.08$\pm$0.02, $\Delta$[SII] = $-$0.12) which may indicate the presence of density-bounded optically thin H~II regions that combined with the low dust extinction favor leaking of ionizing Lyman continuum (LyC) photons. Our best-fit SED model also infers a high nebular ionization (log U = $-2.0$) and a low stellar mass M = 7.8$\pm3.1\times$10$^8$M$_{\odot}$. This discovery not only adds one important object to the known sample of high-redshift He~II emitters but also highlights a potential connection between He$^+$ ionization and favorable ISM conditions for the leakage of ionizing photons from galaxies.
Figures
Figures from the paper (5 more)
Forward citations
Cited by 1 Pith paper
-
New clues on the extended HeII ionization in IZw18 from GTC/MEGARA and JWST/MIRI
The first detection of [Ne V] 14.32 μm emission in IZw18, spatially coincident with He II, shows that ionizing photons harder than 97 eV exist in this local analogue of the first galaxies.
Reference graph
Works this paper leans on
-
[1]
, " * write output.state after.block = add.period write newline
ENTRY address archivePrefix author booktitle chapter doi edition editor eprint howpublished institution journal key month number organization pages publisher school series title misctitle type volume year version url label extra.label sort.label short.list INTEGERS output.state before.all mid.sentence after.sentence after.block FUNCTION init.state.consts ...
-
[2]
write newline
" write newline "" before.all 'output.state := FUNCTION format.url url empty "" new.block "" url * "" * if FUNCTION format.eprint eprint empty "" archivePrefix empty "" archivePrefix "arXiv" = new.block " " eprint * " " * new.block " " eprint * " " * if if if FUNCTION format.doi doi empty "" " " doi * " " * if FUNCTION format.pid doi empty eprint empty ur...
-
[3]
`Ys9 ZGoFq V Xvlb 0BWv O- TTűf9O y䷢ 0 C<37 £D'G 4͠lv.'S ,]` m X u Fqi5 ,` r2 v!P X@ =A ґ[9s\'A J+'CB : .6 z ,` tNѾ 0 Z9 g;( ,]` m X C'0m T 2 &X@ ݵIA ,`8t 2 Հ 8' ^ Yy RqsA4
thebibliography [1] 20pt to REFERENCES 6pt =0pt 10pt plus 3pt =0pt =0pt =1pt plus 1pt =0pt =0pt -12pt =13pt plus 1pt =20pt =13pt plus 1pt \@M =10000 =-1.0em =0pt =0pt 0pt =0pt =1.0em @enumiv\@empty 10000 10000 `\.\@m \@noitemerr \@latex@warning Empty `thebibliography' environment \@ifnextchar \@reference \@latexerr Missing key on reference command Each re...
2017
-
[4]
Alexander , D. M., Bauer , F. E., Brandt , W. N., et al. 2003, , 126, 539, 10.1086/376473
doi:10.1086/376473 2003
-
[5]
Allen , M. G., Groves , B. A., Dopita , M. A., Sutherland , R. S., & Kewley , L. J. 2008, , 178, 20, 10.1086/589652
doi:10.1086/589652 2008
-
[6]
Ashby , M. L. N., Willner , S. P., Fazio , G. G., et al. 2013, , 769, 80, 10.1088/0004-637X/769/1/80
-
[7]
Astropy Collaboration , Robitaille , T. P., Tollerud , E. J., et al. 2013, , 558, A33, 10.1051/0004-6361/201322068
-
[8]
Astropy Collaboration , Price-Whelan , A. M., Sip o cz , B. M., et al. 2018, , 156, 123, 10.3847/1538-3881/aabc4f
Show all 130 references
-
[9]
A., & Skillman , E
Aver , E., Olive , K. A., & Skillman , E. D. 2015, , 2015, 011, 10.1088/1475-7516/2015/07/011
2015 doi
-
[10]
Barrow , K. S. S., Robertson , B. E., Ellis , R. S., et al. 2020, , 902, L39, 10.3847/2041-8213/abbd8e
2020 doi
-
[11]
A., Chisholm , J., Erb , D
Berg , D. A., Chisholm , J., Erb , D. K., et al. 2019, , 878, L3, 10.3847/2041-8213/ab21dc
2019 doi
-
[12]
A., Erb , D
Berg , D. A., Erb , D. K., Auger , M. W., Pettini , M., & Brammer , G. B. 2018, , 859, 164, 10.3847/1538-4357/aab7fa
2018 doi
-
[13]
1996, , 117, 393, 10.1051/aas:1996164
Bertin , E., & Arnouts , S. 1996, , 117, 393, 10.1051/aas:1996164
1996 doi
-
[14]
2019, , 622, A103, 10.1051/0004-6361/201834156
Boquien , M., Burgarella , D., Roehlly , Y., et al. 2019, , 622, A103, 10.1051/0004-6361/201834156
2019 doi
-
[15]
B., van Dokkum , P
Brammer , G. B., van Dokkum , P. G., & Coppi , P. 2008, , 686, 1503, 10.1086/591786
2008 doi
-
[16]
Bromm , V., & Larson , R. B. 2004, , 42, 79, 10.1146/annurev.astro.42.053102.134034
2004
-
[17]
2011, , 49, 373, 10.1146/annurev-astro-081710-102608
Bromm , V., & Yoshida , N. 2011, , 49, 373, 10.1146/annurev-astro-081710-102608
2011 doi
-
[18]
2003, , 344, 1000, 10.1046/j.1365-8711.2003.06897.x
Bruzual , G., & Charlot , S. 2003, , 344, 1000, 10.1046/j.1365-8711.2003.06897.x
2003
-
[19]
C., et al
Calzetti , D., Armus , L., Bohlin , R. C., et al. 2000, , 533, 682, 10.1086/308692
2000 doi
- [20]
-
[21]
2013, , 556, A68, 10.1051/0004-6361/201220969
Cassata , P., Le F \`e vre , O., Charlot , S., et al. 2013, , 556, A68, 10.1051/0004-6361/201220969
2013 doi
- [22]
-
[23]
2015, , 219, 8, 10.1088/0067-0049/219/1/8
Chang , Y.-Y., van der Wel , A., da Cunha , E., & Rix , H.-W. 2015, , 219, 8, 10.1088/0067-0049/219/1/8
2015 doi
-
[24]
L., Aird , J., Reddy , N., et al
Coil , A. L., Aird , J., Reddy , N., et al. 2015, , 801, 35, 10.1088/0004-637X/801/1/35
2015 doi
-
[25]
Crowther , P. A. 2007, , 45, 177, 10.1146/annurev.astro.45.051806.110615
2007 arXiv
-
[26]
A., Schnurr , O., Hirschi , R., et al
Crowther , P. A., Schnurr , O., Hirschi , R., et al. 2010, , 408, 731, 10.1111/j.1365-2966.2010.17167.x
2010
- [27]
- [28]
-
[29]
2003, in The Mass of Galaxies at Low and High Redshift, ed
Dickinson , M., Giavalisco , M., & GOODS Team . 2003, in The Mass of Galaxies at Low and High Redshift, ed. R. Bender & A. Renzini , 324, 10.1007/10899892\_78
2003 doi
- [30]
-
[31]
S., et al
Elbaz , D., Dickinson , M., Hwang , H. S., et al. 2011, , 533, A119, 10.1051/0004-6361/201117239
2011 doi
-
[32]
J., Stanway , E
Eldridge , J. J., Stanway , E. R., Xiao , L., et al. 2017, , 34, e058, 10.1017/pasa.2017.51
2017 doi
-
[33]
U., Bomans , D
Enders , A. U., Bomans , D. J., & Wittje , A. 2023, , 672, A11, 10.1051/0004-6361/202245167
2023 doi
-
[34]
Fitzpatrick , E. L. 1999, , 111, 63, 10.1086/316293
1999 doi
-
[35]
R., Jaskot , A
Flury , S. R., Jaskot , A. E., Ferguson , H. C., et al. 2022, , 930, 126, 10.3847/1538-4357/ac61e4
2022 doi
-
[36]
M., Kriek , M., Sanders , R
Fornasini , F. M., Kriek , M., Sanders , R. L., et al. 2019, , 885, 65, 10.3847/1538-4357/ab4653
2019 doi
- [37]
-
[38]
M., & Prochaska , J
Fumagalli , M., O'Meara , J. M., & Prochaska , J. X. 2011, Science, 334, 1245, 10.1126/science.1213581
2011 doi
-
[39]
R., Kennicutt , Jr., R
Garnett , D. R., Kennicutt , Jr., R. C., Chu , Y.-H., & Skillman , E. D. 1991, , 373, 458, 10.1086/170065
1991 doi
-
[40]
C., Koekemoer , A
Giavalisco , M., Ferguson , H. C., Koekemoer , A. M., et al. 2004, , 600, L93, 10.1086/379232
2004 doi
-
[41]
Gr \"a fener , G., & Vink , J. S. 2015, , 578, L2, 10.1051/0004-6361/201425287
2015 doi
-
[42]
2017, Monthly Notices of the Royal Astronomical Society, 471, 210, 10.1093/mnras/stx1162
Guidetti, D., Bondi, M., Prandoni, I., et al. 2017, Monthly Notices of the Royal Astronomical Society, 471, 210, 10.1093/mnras/stx1162
2017 doi
-
[43]
G., Izotov , Y
Guseva , N. G., Izotov , Y. I., & Thuan , T. X. 2000, , 531, 776, 10.1086/308489
2000 doi
-
[44]
Hunter, J. D. 2007, Computing In Science & Engineering, 9, 90, 10.1109/MCSE.2007.55
2007 doi
-
[45]
K., Shimizu , I., Iwata , I., & Tanaka , M
Inoue , A. K., Shimizu , I., Iwata , I., & Tanaka , M. 2014, , 442, 1805, 10.1093/mnras/stu936
2014 doi
-
[46]
I., Schaerer , D., Thuan , T
Izotov , Y. I., Schaerer , D., Thuan , T. X., et al. 2016, , 461, 3683, 10.1093/mnras/stw1205
2016 doi
-
[47]
I., Schaerer , D., Worseck , G., et al
Izotov , Y. I., Schaerer , D., Worseck , G., et al. 2018 a , , 474, 4514, 10.1093/mnras/stx3115
2018 doi
- [48]
-
[49]
I., Worseck , G., Schaerer , D., et al
Izotov , Y. I., Worseck , G., Schaerer , D., et al. 2018 b , , 478, 4851, 10.1093/mnras/sty1378
2018 doi
-
[50]
A., & Mandel , E
Joye , W. A., & Mandel , E. 2003, in Astronomical Society of the Pacific Conference Series, Vol. 295, Astronomical Data Analysis Software and Systems XII, ed. H. E. Payne , R. I. Jedrzejewski , & R. N. Hook , 489
2003
-
[51]
2011, , 63, 379, 10.1093/pasj/63.sp2.S379
Kajisawa , M., Ichikawa , T., Tanaka , I., et al. 2011, , 63, 379, 10.1093/pasj/63.sp2.S379
2011 doi
-
[52]
S., Devriendt , J., & Slyz , A
Katz , H., Kimm , T., Ellis , R. S., Devriendt , J., & Slyz , A. 2023, , 524, 351, 10.1093/mnras/stad1903
2023 doi
-
[53]
M., Guerrero , M
Kehrig , C., V \' lchez , J. M., Guerrero , M. A., et al. 2018, , 480, 1081, 10.1093/mnras/sty1920
2018 doi
-
[54]
S., Crowther , P
Kehrig , C., Oey , M. S., Crowther , P. A., et al. 2011, , 526, A128, 10.1051/0004-6361/201015493
2011 doi
-
[55]
A., Wisotzki , L., et al
Kerutt , J., Oesch , P. A., Wisotzki , L., et al. 2024, , 684, A42, 10.1051/0004-6361/202346656
2024 doi
-
[56]
J., Dopita , M
Kewley , L. J., Dopita , M. A., Sutherland , R. S., Heisler , C. A., & Trevena , J. 2001, , 556, 121, 10.1086/321545
2001 doi
-
[57]
J., Nicholls , D
Kewley , L. J., Nicholls , D. C., & Sutherland , R. S. 2019, , 57, 511, 10.1146/annurev-astro-081817-051832
2019 doi
-
[58]
E., Reddy , N
Kriek , M., Shapley , A. E., Reddy , N. A., et al. 2015, , 218, 15, 10.1088/0067-0049/218/2/15
2015 doi
-
[59]
K., Hutchings , J., et al
Kumar , A., Ghosh , S. K., Hutchings , J., et al. 2012, in , Vol. 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 84431N, 10.1117/12.924507
2012 doi
- [60]
-
[61]
D., Conti , P
Leitherer , C., Vacca , W. D., Conti , P. S., et al. 1996, , 465, 717, 10.1086/177456
1996 doi
-
[62]
D., et al
Leitherer , C., Schaerer , D., Goldader , J. D., et al. 1999, , 123, 3, 10.1086/313233
1999 doi
-
[63]
2020, , 497, 2839, 10.1093/mnras/staa2143
Liu , B., & Bromm , V. 2020, , 497, 2839, 10.1093/mnras/staa2143
2020 doi
-
[64]
2024, , 965, 152, 10.3847/1538-4357/ad2b63
Liu , W., Veilleux , S., Canalizo , G., et al. 2024, , 965, 152, 10.3847/1538-4357/ad2b63
2024 doi
- [65]
-
[66]
2013, , 553, A132, 10.1051/0004-6361/201321371
Magnelli , B., Popesso , P., Berta , S., et al. 2013, , 553, A132, 10.1051/0004-6361/201321371
2013 doi
-
[67]
2024, , 687, A67, 10.1051/0004-6361/202347087
Maiolino , R., \"U bler , H., Perna , M., et al. 2024, , 687, A67, 10.1051/0004-6361/202347087
2024 doi
-
[68]
D., Plat , A., G \'o mez-Gonz \'a lez , V
Mayya , Y. D., Plat , A., G \'o mez-Gonz \'a lez , V. M. A., et al. 2023, , 519, 5492, 10.1093/mnras/stad017
2023 doi
-
[69]
S., Steidel , C
McLean , I. S., Steidel , C. C., Epps , H. W., et al. 2012, in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, Vol. 8446, Ground-based and Airborne Instrumentation for Astronomy IV, ed. I. S. McLean , S. K. Ramsay , & H. Takami , 84460J, 10.1117/12.924794
2012 doi
-
[70]
C., et al
Merlin , E., Fontana , A., Ferguson , H. C., et al. 2015, , 582, A15, 10.1051/0004-6361/201526471
2015 doi
-
[71]
2016, , 595, A97, 10.1051/0004-6361/201628751
Merlin , E., Bourne , N., Castellano , M., et al. 2016, , 595, A97, 10.1051/0004-6361/201628751
2016 doi
-
[72]
2023, , 673, A50, 10.1051/0004-6361/202345895
Me s tri \'c , U., Vanzella , E., Upadhyaya , A., et al. 2023, , 673, A50, 10.1051/0004-6361/202345895
2023 doi
-
[73]
A., & Jansen , R
Mondal , C., Saha , K., Windhorst , R. A., & Jansen , R. A. 2023 a , , 946, 90, 10.3847/1538-4357/acc110
2023 doi
-
[74]
2023 b , , 264, 40, 10.3847/1538-4365/aca7c4
Mondal , C., Saha , K., Bhattacharya , S., et al. 2023 b , , 264, 40, 10.3847/1538-4365/aca7c4
2023 doi
-
[75]
E., Owen , F
Morrison , G. E., Owen , F. N., Dickinson , M., Ivison , R. J., & Ibar , E. 2010, , 188, 178, 10.1088/0067-0049/188/1/178
2010 doi
-
[76]
J., Condon , J
Murphy , E. J., Condon , J. J., Schinnerer , E., et al. 2011, , 737, 67, 10.1088/0004-637X/737/2/67
2011 doi
-
[77]
2005, , 631, L5, 10.1086/497135
Nagao , T., Motohara , K., Maiolino , R., et al. 2005, , 631, L5, 10.1086/497135
2005 doi
-
[78]
S., Maiolino , R., et al
Nagao , T., Sasaki , S. S., Maiolino , R., et al. 2008, , 680, 100, 10.1086/587888
2008 doi
-
[79]
2022, , 262, 3, 10.3847/1538-4365/ac7710
Nakajima , K., Ouchi , M., Xu , Y., et al. 2022, , 262, 3, 10.3847/1538-4365/ac7710
2022 doi
-
[80]
2019, , 624, A89, 10.1051/0004-6361/201834565
Nanayakkara , T., Brinchmann , J., Boogaard , L., et al. 2019, , 624, A89, 10.1051/0004-6361/201834565
2019 doi
-
[81]
A., Montes , M., Reddy , N., et al
Oesch , P. A., Montes , M., Reddy , N., et al. 2018, , 237, 12, 10.3847/1538-4365/aacb30
2018 doi
- [82]
-
[83]
B., Cohen , J
Oke , J. B., Cohen , J. G., Carr , M., et al. 1995, , 107, 375, 10.1086/133562
1995 doi
-
[84]
2022, , 924, 47, 10.3847/1538-4357/ac33a5
Paswan , A., Saha , K., Leitherer , C., & Schaerer , D. 2022, , 924, 47, 10.3847/1538-4357/ac33a5
2022 doi
-
[85]
2016, , 456, 4191, 10.1093/mnras/stv2859
Patr \' cio , V., Richard , J., Verhamme , A., et al. 2016, , 456, 4191, 10.1093/mnras/stv2859
2016 doi
-
[86]
Y., Ho , L
Peng , C. Y., Ho , L. C., Impey , C. D., & Rix , H.-W. 2002, , 124, 266, 10.1086/340952
2002 doi
-
[87]
G., Cava , A., Barro , G., et al
P \'e rez-Gonz \'a lez , P. G., Cava , A., Barro , G., et al. 2013, , 762, 46, 10.1088/0004-637X/762/1/46
2013 doi
-
[88]
P \'e rez-Montero , E., & D \' az , A. I. 2005, , 361, 1063, 10.1111/j.1365-2966.2005.09263.x
2005
-
[89]
2019, , 490, 978, 10.1093/mnras/stz2616
Plat , A., Charlot , S., Bruzual , G., et al. 2019, , 490, 978, 10.1093/mnras/stz2616
2019 doi
-
[90]
2020, , 644, A21, 10.1051/0004-6361/202038634
Ramambason , L., Schaerer , D., Stasi \'n ska , G., et al. 2020, , 644, A21, 10.1051/0004-6361/202038634
2020 doi
-
[91]
A., Steidel , C
Reddy , N. A., Steidel , C. C., Erb , D. K., Shapley , A. E., & Pettini , M. 2006, , 653, 1004, 10.1086/508851
2006 doi
-
[92]
A., Topping , M
Reddy , N. A., Topping , M. W., Sanders , R. L., Shapley , A. E., & Brammer , G. 2023, , 948, 83, 10.3847/1538-4357/acc869
2023 doi
-
[93]
J., Robertson , B., Tacchella , S., et al
Rieke , M. J., Robertson , B., Tacchella , S., et al. 2023, , 269, 16, 10.3847/1538-4365/acf44d
2023 doi
-
[94]
N., Simmonds , C., et al
Saha , K., Tandon , S. N., Simmonds , C., et al. 2020, Nature Astronomy, 4, 1185, 10.1038/s41550-020-1173-5
2020 doi
-
[95]
2017, , 847, 76, 10.3847/1538-4357/aa8874
Santini , P., Fontana , A., Castellano , M., et al. 2017, , 847, 76, 10.3847/1538-4357/aa8874
2017 doi
-
[96]
2020, , 636, A47, 10.1051/0004-6361/201937170
Saxena , A., Pentericci , L., Mirabelli , M., et al. 2020, , 636, A47, 10.1051/0004-6361/201937170
2020 doi
-
[97]
2002, , 382, 28, 10.1051/0004-6361:20011619
Schaerer , D. 2002, , 382, 28, 10.1051/0004-6361:20011619
2002 doi
-
[98]
2003, , 397, 527, 10.1051/0004-6361:20021525
---. 2003, , 397, 527, 10.1051/0004-6361:20021525
2003 doi
-
[99]
Schaerer , D., Fragos , T., & Izotov , Y. I. 2019, , 622, L10, 10.1051/0004-6361/201935005
2019 doi
-
[100]
2025, , 693, A271, 10.1051/0004-6361/202451454
Schaerer , D., Guibert , J., Marques-Chaves , R., & Martins , F. 2025, , 693, A271, 10.1051/0004-6361/202451454
2025 doi
-
[101]
J., Finkbeiner , D
Schlegel , D. J., Finkbeiner , D. P., & Davis , M. 1998, , 500, 525, 10.1086/305772
1998 doi
-
[102]
Senchyna , P., & Stark , D. P. 2019, , 484, 1270, 10.1093/mnras/stz058
2019 doi
-
[103]
P., Vidal-Garc \' a , A., et al
Senchyna , P., Stark , D. P., Vidal-Garc \' a , A., et al. 2017, , 472, 2608, 10.1093/mnras/stx2059
2017 doi
-
[104]
E., Steidel , C
Shapley , A. E., Steidel , C. C., Pettini , M., & Adelberger , K. L. 2003, , 588, 65, 10.1086/373922
2003 doi
-
[105]
2018, , 70, S15, 10.1093/pasj/psx107
Shibuya , T., Ouchi , M., Harikane , Y., et al. 2018, , 70, S15, 10.1093/pasj/psx107
2018 doi
-
[106]
2012, , 421, 1043, 10.1111/j.1365-2966.2012.20439.x
Shirazi , M., & Brinchmann , J. 2012, , 421, 1043, 10.1111/j.1365-2966.2012.20439.x
2012
-
[107]
E., Whitaker , K
Skelton , R. E., Whitaker , K. E., Momcheva , I. G., et al. 2014, , 214, 24, 10.1088/0067-0049/214/2/24
2014 doi
-
[108]
M., Windhorst , R
Smith , B. M., Windhorst , R. A., Jansen , R. A., et al. 2018, , 853, 191, 10.3847/1538-4357/aaa3dc
2018 doi
-
[109]
J., Oey , M
Smith , L. J., Oey , M. S., Hernandez , S., et al. 2023, , 958, 194, 10.3847/1538-4357/ad00b4
2023 doi
-
[110]
2015, , 808, 139, 10.1088/0004-637X/808/2/139
Sobral , D., Matthee , J., Darvish , B., et al. 2015, , 808, 139, 10.1088/0004-637X/808/2/139
2015 doi
-
[111]
R., & Eldridge , J
Stanway , E. R., & Eldridge , J. J. 2019, , 621, A105, 10.1051/0004-6361/201834359
2019 doi
-
[112]
C., Adelberger , K
Steidel , C. C., Adelberger , K. L., Shapley , A. E., et al. 2003, , 592, 728, 10.1086/375772
2003 doi
-
[113]
C., Strom , A
Steidel , C. C., Strom , A. L., Pettini , M., et al. 2016, , 826, 159, 10.3847/0004-637X/826/2/159
2016 doi
-
[114]
2007, , 382, 945, 10.1111/j.1365-2966.2007.12215.x
Tornatore , L., Ferrara , A., & Schneider , R. 2007, , 382, 945, 10.1111/j.1365-2966.2007.12215.x
2007
-
[115]
L., & Shull , J
Tumlinson , J., Giroux , M. L., & Shull , J. M. 2001, , 550, L1, 10.1086/319477
2001 doi
-
[116]
Tumlinson , J., & Shull , J. M. 2000, , 528, L65, 10.1086/312432
2000 doi
-
[117]
2022, , 930, 37, 10.3847/1538-4357/ac602d
Umeda , H., Ouchi , M., Nakajima , K., et al. 2022, , 930, 37, 10.3847/1538-4357/ac602d
2022 doi
-
[118]
2024, , 686, A185, 10.1051/0004-6361/202449184
Upadhyaya , A., Marques-Chaves , R., Schaerer , D., et al. 2024, , 686, A185, 10.1051/0004-6361/202449184
2024 doi
-
[119]
L., et al
Venditti , A., Bromm , V., Finkelstein , S. L., et al. 2024, , 973, L12, 10.3847/2041-8213/ad7387
2024 doi
-
[120]
2015, , 578, A7, 10.1051/0004-6361/201423978
Verhamme , A., Orlitov \'a , I., Schaerer , D., & Hayes , M. 2015, , 578, A7, 10.1051/0004-6361/201423978
2015 doi
-
[121]
2017, , 597, A13, 10.1051/0004-6361/201629264
Verhamme , A., Orlitov \'a , I., Schaerer , D., et al. 2017, , 597, A13, 10.1051/0004-6361/201629264
2017 doi
-
[122]
S., Heger , A., Krumholz , M
Vink , J. S., Heger , A., Krumholz , M. R., et al. 2015, Highlights of Astronomy, 16, 51, 10.1017/S1743921314004657
2015 doi
-
[123]
M., Leitherer , C., et al
Wang , B., Heckman , T. M., Leitherer , C., et al. 2019, , 885, 57, 10.3847/1538-4357/ab418f
2019 doi
-
[124]
M., Amor \' n , R., et al
Wang , B., Heckman , T. M., Amor \' n , R., et al. 2021, , 916, 3, 10.3847/1538-4357/ac0434
2021 doi
-
[125]
2024, , 967, L42, 10.3847/2041-8213/ad4ced
Wang , X., Cheng , C., Ge , J., et al. 2024, , 967, L42, 10.3847/2041-8213/ad4ced
2024 doi
-
[126]
H., Demchenko , V
Wise , J. H., Demchenko , V. G., Halicek , M. T., et al. 2014, , 442, 2560, 10.1093/mnras/stu979
2014 doi
-
[127]
2017, , 844, 171, 10.3847/1538-4357/aa7d4d
Yang , H., Malhotra , S., Gronke , M., et al. 2017, , 844, 171, 10.3847/1538-4357/aa7d4d
2017 doi
-
[128]
I., Dav \'e , R., et al
Yang , Y., Zabludoff , A. I., Dav \'e , R., et al. 2006, , 640, 539, 10.1086/497898
2006 doi
-
[129]
K., & Jensen , H
Zackrisson , E., Inoue , A. K., & Jensen , H. 2013, , 777, 39, 10.1088/0004-637X/777/1/39
2013 doi
-
[130]
R., Ciardullo , R., Gebhardt , H., et al
Zeimann , G. R., Ciardullo , R., Gebhardt , H., et al. 2014, , 790, 113, 10.1088/0004-637X/790/2/113
2014 doi
Reviewed August 7, 2026 · model on record in the stance chip above.
Discussion (0). Continue with ORCID to comment.