SERENADE. II. An ALMA Multiband Dust Continuum Analysis of 28 Galaxies at 5<z<8 and the Physical Origin of the Dust Temperature Evolution

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dc.contributor.authorMitsuhashi, Ikki
dc.contributor.authorHarikane, Yuichi
dc.contributor.authorBauer, Franz E.
dc.contributor.authorBakx, Tom J. L. C.
dc.contributor.authorFerrara, Andrea
dc.contributor.authorFujimoto, Seiji
dc.contributor.authorHashimoto, Takuya
dc.contributor.authorInoue, Akio K.
dc.contributor.authorIwasawa, Kazushi
dc.contributor.authorNishimura, Yuri
dc.contributor.authorImanishi, Masatoshi
dc.contributor.authorOno, Yoshiaki
dc.contributor.authorSaito, Toshiki
dc.contributor.authorSugahara, Yuma
dc.contributor.authorUmehata, Hideki
dc.contributor.authorVallini, Livia
dc.contributor.authorWang, Tao
dc.contributor.authorZavala, Jorge A.
dc.date.accessioned2025-01-20T16:10:54Z
dc.date.available2025-01-20T16:10:54Z
dc.date.issued2024
dc.description.abstractWe present an analysis of the Atacama Large Millimeter-submillimeter Array (ALMA) multiband dust continuum observations for 28 spectroscopically confirmed bright Lyman break galaxies at 5 < z < 8. Our sample consists of 11 galaxies at z similar to 6 newly observed in our ALMA program, which substantially increases the number of 5 < z < 8 galaxies with both rest-frame 88 and 158 mu m continuum observations, allowing us to simultaneously measure the IR luminosity and dust temperature for a statistical sample of z greater than or similar to 5 galaxies for the first time. We derive the relationship between the ultraviolet (UV) slope (beta(UV)) and infrared excess (IRX) for the z similar to 6 galaxies, and find a shallower IRX-beta(UV) relation compared to the previous results at z similar to 2-4. Based on the IRX-beta(UV) relation consistent with our results and the beta(UV)-M-UV relation including fainter galaxies in the literature, we find a limited contribution of the dust-obscured star formation to the total star formation rate density, similar to 30% at z similar to 6. Our measurements of the dust temperature at z similar to 6-7, T-dust = 40.9(-9.1)(+10.0) K on average, support a gentle increase of T-dust from z = 0 to z similar to 6-7. Using an analytic model with parameters consistent with recent James Webb Space Telescope results, we discuss that the observed redshift evolution of the dust temperature can be reproduced by an similar to 0.6 dex decrease in the gas depletion timescale and similar to 0.4 dex decrease in the metallicity. The variety of T-dust observed at high redshifts can also be naturally explained by scatters around the star formation main sequence and average mass-metallicity relation including an extremely high dust temperature of T-dust > 80 K observed in a galaxy at z = 8.3.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad5675
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad5675
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90237
dc.identifier.wosidWOS:001291501300001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleSERENADE. II. An ALMA Multiband Dust Continuum Analysis of 28 Galaxies at 5&lt;z&lt;8 and the Physical Origin of the Dust Temperature Evolution
dc.typeartículo
dc.volumen971
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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