JWST and ALMA Multiple-line Study in and around a Galaxy at <i>z</i>=8.496: Optical to Far-Infrared Line Ratios and the Onset of an Outflow Promoting Ionizing Photon Escape

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dc.contributor.authorFujimoto, Seiji
dc.contributor.authorOuchi, Masami
dc.contributor.authorNakajima, Kimihiko
dc.contributor.authorHarikane, Yuichi
dc.contributor.authorIsobe, Yuki
dc.contributor.authorBrammer, Gabriel
dc.contributor.authorOguri, Masamune
dc.contributor.authorGimenez-Arteaga, Clara
dc.contributor.authorHeintz, Kasper E.
dc.contributor.authorKokorev, Vasily
dc.contributor.authorBauer, Franz E.
dc.contributor.authorFerrara, Andrea
dc.contributor.authorKojima, Takashi
dc.contributor.authorLagos, Claudia del P.
dc.contributor.authorLaura, Sommovigo
dc.contributor.authorSchaerer, Daniel
dc.contributor.authorShimasaku, Kazuhiro
dc.contributor.authorHatsukade, Bunyo
dc.contributor.authorKohno, Kotaro
dc.contributor.authorSun, Fengwu
dc.contributor.authorValentino, Francesco
dc.contributor.authorWatson, Darach
dc.contributor.authorFudamoto, Yoshinobu
dc.contributor.authorInoue, Akio K.
dc.contributor.authorGonzalez-Lopez, Jorge
dc.contributor.authorKoekemoer, Anton M.
dc.contributor.authorKnudsen, Kirsten
dc.contributor.authorLee, Minju M.
dc.contributor.authorMagdis, Georgios E.
dc.contributor.authorRichard, Johan
dc.contributor.authorStrait, Victoria B.
dc.contributor.authorSugahara, Yuma
dc.contributor.authorTamura, Yoichi
dc.contributor.authorToft, Sune
dc.contributor.authorUmehata, Hideki
dc.contributor.authorWalth, Gregory
dc.date.accessioned2025-01-20T17:06:06Z
dc.date.available2025-01-20T17:06:06Z
dc.date.issued2024
dc.description.abstractWe present Atacama Large Millimeter/submillimeter Array (ALMA) deep spectroscopy for a lensed galaxy at z(spec) = 8.496 with log(M-star/M-circle dot) similar to 7.8 whose optical nebular lines and stellar continuum are detected by JWST/NIRSpec and NIRCam Early Release Observations in the field of SMACS J0723.3-7327. Our ALMA spectrum shows [O III] 88 mu m and [C II] 158 mu m line detections at 4.0 sigma and 4.5 sigma, respectively. The redshift and position of the [O III] line coincide with those of the JWST source, while the [C II] line is blueshifted by 90 km s(-1) with a spatial offset of 0.'' 5 (approximate to 0.5 kpc in the source plane) from the centroid of the JWST source. The NIRCam F444W image, including [O III] lambda 5007 and H beta line emission, spatially extends beyond the stellar components by a factor of >8. This indicates that the z = 8.5 galaxy has already experienced strong outflows as traced by extended [O III] lambda 5007 and offset [C II] emission, which would promote ionizing photon escape and facilitate reionization. With careful slit-loss corrections and the removal of emission spatially outside the galaxy, we evaluate the [O III] 88 mu m/lambda 5007 line ratio, and derive the electron density n (e) by photoionization modeling to be 220(-130)(+230) cm(-3), which is comparable with those of z similar to 2-3 galaxies. We estimate an [O III] 88 mu m/[C II] 158 mu m line ratio in the galaxy of >4, as high as those of known z similar to 6-9 galaxies. This high [O III] 88 mu m/[C II] 158 mu m line ratio is generally explained by the high n(e) as well as the low metallicity (Z(gas)/Z(circle dot)=0.04(-0.02)(+0.02)), high ionization parameter (log U > -2.27), and low carbon-to-oxygen abundance ratio (log(C/O) = [-0.52: -0.24]) obtained from the JWST/NIRSpec data; further [C II] follow-up observations will constrain the covering fraction of photodissociation regions.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad235c
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad235c
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90754
dc.identifier.wosidWOS:001197650700001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleJWST and ALMA Multiple-line Study in and around a Galaxy at <i>z</i>=8.496: Optical to Far-Infrared Line Ratios and the Onset of an Outflow Promoting Ionizing Photon Escape
dc.typeartículo
dc.volumen964
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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