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The evolution of compact massive quiescent and star-forming galaxies derived from the R_e–R_h and M_(star)–M_h relations

Zanisi, L. and Shankar, F. and Fu, H. and Rodriguez-Puebla, A. and Avila-Reese, V. and Faisst, A. and Daddi, E. and Boco, L. and Lapi, A, and Giavalisco, M. and Saracco, P. and Buitrago, F. and Huertas-Company, M. and Puglisi, A. and Dekel, A. (2021) The evolution of compact massive quiescent and star-forming galaxies derived from the R_e–R_h and M_(star)–M_h relations. Monthly Notices of the Royal Astronomical Society, 505 (3). pp. 4555-4570. ISSN 0035-8711. doi:10.1093/mnras/stab1472.

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The mean size (effective radius R_e) of massive galaxies (MGs; M_(star) > 10^(11.2)M_⊙) is observed to increase steadily with cosmic time. It is still unclear whether this trend originates from the size growth of individual galaxies (via, e.g. mergers and/or AGN feedback) or from the inclusion of larger galaxies entering the selection at later epochs (progenitor bias). We here build a data-driven, flexible theoretical framework to probe the structural evolution of MGs. We assign galaxies to dark matter haloes via stellar mass–halo mass (SMHM) relations with varying high-mass slopes and scatters σ_(SMHM) in stellar mass at fixed halo mass, and assign sizes to galaxies using an empirically motivated, constant and linear relationship between Re and the host dark matter halo radius Rh. We find that (1) the fast mean size growth of MGs is well reproduced independently of the shape of the input SMHM relation; (2) the numbers of compact MGs grow steadily until z ≳ 2 and fall off at lower redshifts, suggesting a lesser role of progenitor bias at later epochs; (3) a time-independent scatter σ_(SMHM) is consistent with a scenario in which compact star-forming MGs transition into quiescent MGs in a few 10⁸ yr with a negligible structural evolution during the compact phase, while a scatter increasing at high redshift implies significant size growth during the star-forming phase. A robust measurement of the size function of MGs at high redshift can set strong constraints on the scatter of the SMHM relation and, by extension, on models of galaxy evolution.

Item Type:Article
Related URLs:
URLURL TypeDescription ItemCode
Shankar, F.0000-0001-8973-5051
Rodriguez-Puebla, A.0000-0002-0170-5358
Avila-Reese, V.0000-0002-3461-2342
Faisst, A.0000-0002-9382-9832
Daddi, E.0000-0002-3331-9590
Giavalisco, M.0000-0002-7831-8751
Saracco, P.0000-0003-3959-2595
Buitrago, F.0000-0002-2861-9812
Huertas-Company, M.0000-0002-1416-8483
Puglisi, A.0000-0001-9369-1805
Dekel, A.0000-0003-4174-0374
Alternate Title:The evolution of compact massive quiescent and star-forming galaxies derived from the Re–Rh and Mstar–Mh relations
Additional Information:© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2021 May 17. Received 2021 March 27; in original form 2020 November 10. Published: 22 May 2021. We thank the anonymous referee for helping us improve the presentation of the results. LZ acknowledges funding from the Science and Technologies Facilities Council, which funded his PhD through the DISCnet Center for Doctoral Training. FS acknowledges partial support from a Leverhulme Trust Research Fellowship. We thank Ignacio Trujillo, Simona Mei, and Adriana Gargiulo for useful comments and Nushkia Chamba for providing data tables for the measurements of R1. HF acknowledges support from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 860744. Data Availability: All data will be shared upon reasonable request to the authors. We provide our codes at
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Leverhulme TrustUNSPECIFIED
Marie Curie Fellowship860744
Subject Keywords:galaxies: abundances – galaxies: fundamental parameters – galaxies: high-redshift – galaxies: star formation
Issue or Number:3
Record Number:CaltechAUTHORS:20210916-143425405
Persistent URL:
Official Citation:L Zanisi, F Shankar, H Fu, A Rodriguez-Puebla, V Avila-Reese, A Faisst, E Daddi, L Boco, A Lapi, M Giavalisco, P Saracco, F Buitrago, M Huertas-Company, A Puglisi, A Dekel, The evolution of compact massive quiescent and star-forming galaxies derived from the Re–Rh and Mstar–Mh relations, Monthly Notices of the Royal Astronomical Society, Volume 505, Issue 3, August 2021, Pages 4555–4570,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110916
Deposited By: Tony Diaz
Deposited On:16 Sep 2021 15:45
Last Modified:16 Sep 2021 15:45

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