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

Scoville, N. and Lee, N. and Vanden Bout, P. and Díaz-Santos, T. and Sanders, D. B. and Darvish, B. and Bongiorno, A. and Casey, C. M. and Murchikova, L. and Koda, J. and Capak, P. and Vlahakis, Catherine and Ilbert, O. and Sheth, K. and Morokuma-Matsui, K. and Ivison, R. J. and Aussel, H. and Laigle, C. and McCracken, H. J. and Armus, L. and Pope, A. and Toft, S. and Masters, D. (2017) Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift. Astrophysical Journal, 837 (2). Art. No. 150. ISSN 1538-4357. doi:10.3847/1538-4357/aa61a0.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Scoville, N.0000-0002-0438-3323
Díaz-Santos, T.0000-0003-0699-6083
Sanders, D. B.0000-0002-1233-9998
Darvish, B.0000-0003-4919-9017
Casey, C. M.0000-0002-0930-6466
Koda, J.0000-0002-8762-7863
Capak, P.0000-0003-3578-6843
Vlahakis, Catherine0000-0003-3745-4228
Ilbert, O.0000-0002-7303-4397
Sheth, K.0000-0002-5496-4118
Ivison, R. J.0000-0001-5118-1313
Aussel, H.0000-0002-1371-5705
McCracken, H. J.0000-0002-9489-7765
Armus, L.0000-0003-3498-2973
Pope, A.0000-0001-8592-2706
Toft, S.0000-0003-3631-7176
Masters, D.0000-0001-5382-6138
Additional Information:© 2017 The American Astronomical Society. Received 2016 December 2; revised 2017 February 15; accepted 2017 February 16; published 2017 March 15. We thank Zara Scoville for proofreading the manuscript, and we thank the referee for a number of constructive suggestions. In addition, several useful references on the Galactic GMCs were provided by John Carpenter and John Bally, and good suggestions were provided by Fabian Walter. This paper makes use of the following ALMA data: ADS/JAO.ALMA 2011.0.00097.S, 2012.1.00076.S, 2012.1.00523.S, 2013.1.00034.S, 2013.1.00111.S, 2015.1.00137.S, 2013.1.00118.S, and 2013.1.00151.S. We plan to release the images used here via the IPAC/IRSA COSMOS archive at in 2017. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada), NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. R.J.I. acknowledges support from the European Research Council (ERC) in the form of Advanced Grant 321302, COSMICISM. S.T. acknowledges support from the European Research Council in the form of Consolidator Grant 648179, ConTExt. B.D. acknowledges financial support from NASA through the Astrophysics Data Analysis Program (ADAP), grant number NNX12AE20G.
Group:COSMOS, Infrared Processing and Analysis Center (IPAC), Astronomy Department
Funding AgencyGrant Number
European Research Council (ERC)321302
European Research Council (ERC)648179
Subject Keywords:accretion, accretion disks – evolution – galaxies: ISM – galaxies: starburst
Issue or Number:2
Record Number:CaltechAUTHORS:20170314-095505234
Persistent URL:
Official Citation:N. Scoville et al 2017 ApJ 837 150
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75088
Deposited By: Tony Diaz
Deposited On:15 Mar 2017 18:42
Last Modified:15 Nov 2021 16:30

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