Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift

Autor: Caitlin M. Casey, Lee Armus, N. Z. Scoville, P. Vanden Bout, Tanio Díaz-Santos, Jin Koda, Herve Aussel, Angelo Bongiorno, Sune Toft, Kartik Sheth, Kana Morokuma-Matsui, Nicholas Lee, Behnam Darvish, O. Ilbert, Lena Murchikova, Peter Capak, D. Masters, H. J. McCracken, Alexandra Pope, Clotilde Laigle, Catherine Vlahakis, Rob Ivison, David S Sanders
Přispěvatelé: Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), ITA, USA, FRA, DEU, CHL, DNK, JPN
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2017, 837 (2), ⟨10.3847/1538-4357/aa61a0⟩
The Astrophysical Journal, 2017, 837 (2), ⟨10.3847/1538-4357/aa61a0⟩
Scoville, N, Lee, N, Bout, P V, Diaz-Santos, T, Sanders, D, Darvish, B, Bongiorno, A, Casey, C M, Murchikova, L, Koda, J, Capak, P, Vlahakis, C, Ilbert, O, Sheth, K, Morokuma-Matsui, K, Ivison, R J, Aussel, H, Laigle, C, McCracken, H J, Armus, L, Pope, A, Toft, S & Masters, D 2017, ' Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift ', Astrophysical Journal, vol. 837, no. 2, 150 . https://doi.org/10.3847/1538-4357/aa61a0
ISSN: 0004-637X
1538-4357
1538-3873
0067-0049
DOI: 10.3847/1538-4357/aa61a0⟩
Popis: ALMA observations of the long wavelength dust continuum are used to estimate the interstellar medium (ISM) masses in a sample of 708 galaxies at z = 0.3 to 4.5 in the COSMOS field. The galaxy sample has known far-infrared luminosities and, hence, star formation rates (SFRs) and stellar masses ({M}* ) from the optical-infrared spectrum fitting. The galaxies sample SFRs from the main sequence (MS) to 50 times above the MS. The derived ISM masses are used to determine the dependence of gas mass on redshift, {M}* , and specific SFR (sSFR) relative to the MS. The ISM masses increase approximately with the 0.63 power of the rate of increase in SFRs with redshift and the 0.32 power of the sSFR/sSFRMS. The SF efficiencies also increase as the 0.36 power of the SFR redshift evolution and the 0.7 power of the elevation above the MS; thus the increased activities at early epochs are driven by both increased ISM masses and SF efficiency. Using the derived ISM mass function, we estimate the accretion rates of gas required to maintain continuity of the MS evolution (> 100 {M}☉ yr-1 at z > 2.5). Simple power-law dependencies are similarly derived for the gas accretion rates. We argue that the overall evolution of galaxies is driven by the rates of gas accretion. The cosmic evolution of total ISM mass is estimated and linked to the evolution of SF and active galactic nucleus activity at early epochs.
Databáze: OpenAIRE
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