1. GOODS-ALMA 2.0:Starbursts in the main sequence reveal compact star formation regulating galaxy evolution prequenching
- Author
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C. Gómez-Guijarro, D. Elbaz, M. Xiao, V. I. Kokorev, G. E. Magdis, B. Magnelli, E. Daddi, F. Valentino, M. T. Sargent, M. Dickinson, M. Béthermin, M. Franco, A. Pope, B. S. Kalita, L. Ciesla, R. Demarco, H. Inami, W. Rujopakarn, X. Shu, T. Wang, L. Zhou, D. M. Alexander, F. Bournaud, R. Chary, H. C. Ferguson, S. L. Finkelstein, M. Giavalisco, D. Iono, S. Juneau, J. S. Kartaltepe, G. Lagache, E. Le Floc’h, R. Leiton, L. Leroy, L. Lin, K. Motohara, J. Mullaney, K. Okumura, M. Pannella, C. Papovich, E. Treister, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), University of Copenhagen = Københavns Universitet (UCPH), Danmarks Tekniske Universitet = Technical University of Denmark (DTU), University of Sussex, Community Science and Data Center, Laboratoire d'Astrophysique de Marseille (LAM), 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), University of Hertfordshire [Hatfield] (UH), University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS), Universidad de Concepción - University of Concepcion [Chile], Hiroshima University, Chulalongkorn University [Bangkok], Anhui Normal University, Nanjing University (NJU), Durham University, California Institute of Technology (CALTECH), Space Telescope Science Institute (STSci), University of Texas at Austin [Austin], National Astronomical Observatory of Japan (NAOJ), Rochester Institute of Technology, Academia Sinica, The University of Tokyo (UTokyo), University of Sheffield [Sheffield], Università degli studi di Trieste = University of Trieste, Texas A&M University [College Station], and Pontificia Universidad Católica de Chile (UC)
- Subjects
submillimeter: galaxies ,SPECTROSCOPIC SURVEY ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,SIMILAR-TO 3 ,MASS-METALLICITY RELATION ,INFRARED-EMISSION ,structure [Galaxies] ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,star formation [Galaxies] ,star formation ,high-redshift ,high-redshift [Galaxies] ,galaxies [Submillimeter] ,galaxies: high-redshift ,galaxies ,evolution ,DUST TEMPERATURES ,Astrophysics::Solar and Stellar Astrophysics ,submillimeter ,structure ,Astrophysics::Galaxy Astrophysics ,FORMING GALAXIES ,SUBMILLIMETER GALAXIES ,galaxies: fundamental parameters ,Astronomy and Astrophysics ,evolution [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,ORIGINS DEEP SURVEY ,MOLECULAR GAS FRACTIONS ,Space and Planetary Science ,galaxies: star formation ,Astrophysics of Galaxies (astro-ph.GA) ,fundamental parameters [Galaxies] ,galaxies: structure ,Astrophysics::Earth and Planetary Astrophysics ,galaxies: evolution ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,fundamental parameters ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Compact star formation appears to be generally common in dusty star-forming galaxies (SFGs). However, its role in the framework set by the scaling relations in galaxy evolution remains to be understood. In this work we follow up on the galaxy sample from the GOODS-ALMA 2.0 survey, an ALMA blind survey at 1.1mm covering a continuous area of 72.42arcmin$^2$ using two array configurations. We derived physical properties, such as star formation rates, gas fractions, depletion timescales, and dust temperatures for the galaxy sample built from the survey. There exists a subset of galaxies that exhibit starburst-like short depletion timescales, but they are located within the scatter of the so-called main sequence of SFGs. These are dubbed starbursts in the main sequence and display the most compact star formation and they are characterized by the shortest depletion timescales, lowest gas fractions, and highest dust temperatures of the galaxy sample, compared to typical SFGs at the same stellar mass and redshift. They are also very massive, accounting for $\sim 60\%$ of the most massive galaxies in the sample ($\log (M_{\rm{*}}/M_{\odot}) > 11.0$). We find trends between the areas of the ongoing star formation regions and the derived physical properties for the sample, unveiling the role of compact star formation as a physical driver of these properties. Starbursts in the main sequence appear to be the extreme cases of these trends. We discuss possible scenarios of galaxy evolution to explain the results drawn from our galaxy sample. Our findings suggest that the star formation rate is sustained in SFGs by gas and star formation compression, keeping them within the main sequence even when their gas fractions are low and they are presumably on the way to quiescence., Accepted by A&A. 26 pages, 13 figures
- Published
- 2022