The Gas and Stellar Content of a Metal-poor Galaxy at z=8.496 as Revealed by JWST and ALMA

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dc.contributor.authorHeintz, K. E.
dc.contributor.authorGimenez-Arteaga, C.
dc.contributor.authorFujimoto, S.
dc.contributor.authorBrammer, G.
dc.contributor.authorEspada, D.
dc.contributor.authorGillman, S.
dc.contributor.authorGonzalez-Lopez, J.
dc.contributor.authorGreve, T. R.
dc.contributor.authorHarikane, Y.
dc.contributor.authorHatsukade, B.
dc.contributor.authorKnudsen, K. K.
dc.contributor.authorKoekemoer, A. M.
dc.contributor.authorKohno, K.
dc.contributor.authorKokorev, V.
dc.contributor.authorLee, M. M.
dc.contributor.authorMagdis, G. E.
dc.contributor.authorNelson, E. J.
dc.contributor.authorRizzo, F.
dc.contributor.authorSanders, R. L.
dc.contributor.authorSchaerer, D.
dc.contributor.authorShapley, A. E.
dc.contributor.authorStrait, V. B.
dc.contributor.authorToft, S.
dc.contributor.authorValentino, F.
dc.contributor.authorvan der Wel, A.
dc.contributor.authorVijayan, A. P.
dc.contributor.authorWatson, D.
dc.contributor.authorBauer, F. E.
dc.contributor.authorChristiansen, C. R.
dc.contributor.authorWilson, S. N.
dc.date.accessioned2025-01-20T20:17:31Z
dc.date.available2025-01-20T20:17:31Z
dc.date.issued2023
dc.description.abstractWe present a joint analysis of the galaxy S04590 at z = 8.496 based on NIRSpec, NIRCam, and NIRISS observations obtained as part of the Early Release Observations program of the James Webb Space Telescope (JWST) and the far-infrared [C ii] 158 mu m emission line detected by dedicated Atacama Large Millimeter/submillimeter Array (ALMA) observations. We determine the physical properties of S04590 from modeling of the spectral energy distribution (SED) and through the redshifted optical nebular emission lines detected with JWST/NIRSpec. The best-fit SED model reveals a low-mass (M-? = 10(7.2)-10(8) M-?) galaxy with a low oxygen abundance of derived from the strong nebular and auroral emission lines. Assuming that [C ii] effectively traces the interstellar medium, we estimate the total gas mass of the galaxy to be M-gas = (8.0 +/- 4.0) x 10(8) M-? based on the luminosity and spatial extent of [C ii]. This yields an exceptionally high gas fraction, f(gas) = M-gas/(M-gas + M-?) ? 90%, though one still consistent with the range expected for low metallicity. We further derive the metal mass of the galaxy based on the gas mass and gas-phase metallicity, which we find to be consistent with the expected metal production from Type II supernovae. Finally, we make the first constraints on the dust-to-gas (DTG) and dust-to-metal (DTM) ratios of galaxies in the epoch of reionization at z ? 6, showing overall low mass ratios of logDTG < -3.8 and logDTM < -0.5, though they are consistent with established scaling relations and in particular with those of the local metal-poor galaxy I Zwicky 18. Our analysis highlights the synergy between ALMA and JWST in characterizing the gas, metal, and stellar content of the first generation of galaxies.
dc.fuente.origenWOS
dc.identifier.doi10.3847/2041-8213/acb2cf
dc.identifier.eissn2041-8213
dc.identifier.issn2041-8205
dc.identifier.urihttps://doi.org/10.3847/2041-8213/acb2cf
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92403
dc.identifier.wosidWOS:000937117200001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal letters
dc.rightsacceso restringido
dc.subjectUnified Astronomy Thesaurus concepts
dc.subjectHigh-redshift galaxies (734)
dc.subjectGalaxies (573)
dc.subjectInterstellar medium (847)
dc.subjectStar formation (1569)
dc.subjectGalaxy formation (595)
dc.subjectGalaxy evolution (594)
dc.titleThe Gas and Stellar Content of a Metal-poor Galaxy at z=8.496 as Revealed by JWST and ALMA
dc.typeartículo
dc.volumen944
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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