The Evolution of the IR Luminosity Function and Dust-obscured Star Formation over the Past 13 Billion Years

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dc.contributor.authorZavala, J. A.
dc.contributor.authorCasey, C. M.
dc.contributor.authorManning, S. M.
dc.contributor.authorAravena, M.
dc.contributor.authorBethermin, M.
dc.contributor.authorCaputi, K. I.
dc.contributor.authorClements, D. L.
dc.contributor.authorCunha, E. da
dc.contributor.authorDrew, P.
dc.contributor.authorFinkelstein, S. L.
dc.contributor.authorFujimoto, S.
dc.contributor.authorHayward, C.
dc.contributor.authorHodge, J.
dc.contributor.authorKartaltepe, J. S.
dc.contributor.authorKnudsen, K.
dc.contributor.authorKoekemoer, A. M.
dc.contributor.authorLong, A. S.
dc.contributor.authorMagdis, G. E.
dc.contributor.authorMan, A. W. S.
dc.contributor.authorPopping, G.
dc.contributor.authorSanders, D.
dc.contributor.authorScoville, N.
dc.contributor.authorSheth, K.
dc.contributor.authorStaguhn, J.
dc.contributor.authorToft, S.
dc.contributor.authorTreister, E.
dc.contributor.authorVieira, J. D.
dc.contributor.authorYun, M. S.
dc.date.accessioned2023-05-19T20:25:14Z
dc.date.available2023-05-19T20:25:14Z
dc.date.issued2021
dc.description.abstractWe present the first results from the Mapping Obscuration to Reionization with ALMA (MORA) survey, the largest Atacama Large Millimeter/submillimeter Array (ALMA) blank-field contiguous survey to date (184 arcmin(2)) and the only at 2 mm to search for dusty star-forming galaxies (DSFGs). We use the 13 sources detected above 5 sigma to estimate the first ALMA galaxy number counts at this wavelength. These number counts are then combined with the state-of-the-art galaxy number counts at 1.2 and 3 mm and with a backward evolution model to place constraints on the evolution of the IR luminosity function and dust-obscured star formation in the past 13 billion years. Our results suggest a steep redshift evolution on the space density of DSFGs and confirm the flattening of the IR luminosity function at faint luminosities, with a slope of alpha(LF) = -0.42(-0.04)(+0.02). We conclude that the dust-obscured component, which peaks at z approximate to 2-2.5, has dominated the cosmic history of star formation for the past similar to 12 billion years, back to z similar to 4. At z = 5, the dust-obscured star formation is estimated to be similar to 35% of the total star formation rate density and decreases to 25%-20% at z = 6-7, implying a minor contribution of dusten-shrouded star formation in the first billion years of the universe. With the dust-obscured star formation history constrained up to the end of the epoch of reionization, our results provide a benchmark to test galaxy formation models, to study the galaxy mass assembly history, and to understand the dust and metal enrichment of the universe at early times.
dc.fuente.origenORCID-mayo23
dc.identifier.doi10.3847/1538-4357/abdb27
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/67328
dc.language.isoen
dc.rightsacceso restringido
dc.titleThe Evolution of the IR Luminosity Function and Dust-obscured Star Formation over the Past 13 Billion Yearses_ES
dc.typeartículo
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