Year: 2006
Type: article
Abstract: We present the evolution of the luminosity-size and stellar mass-size relations of luminous ( L V ≳ 3.4 × 10 10 h L ☉ ) and massive ( M * ≳ 3 × 10 10 h M ☉ ) galaxies in the last ~11 Gyr. We use very deep near-infrared images of the Hubble Deep Field-South and the MS 1054-03 field in the J s , H , and K s bands from FIRES to retrieve the sizes in the optical rest frame for galaxies with z > 1. We combine our results with those from GEMS at 0.2 < z < 1 and SDSS at z ~ 0.1 to achieve a comprehensive picture of the optical rest-frame size evolution from z = 0 to 3. Galaxies are differentiated according to their light concentration using the Sérsic index n . For less concentrated objects, the galaxies at a given luminosity were typically ~3 ± 0.5 (±2 σ) times smaller at z ~ 2.5 than those we see today. The stellar mass-size relation has evolved less: the mean size at a given stellar mass was ~2 ± 0.5 times smaller at z ~ 2.5, evolving proportionally to (1 + z ) -0.40±0.06 . Simple scaling relations between dark matter halos and baryons in a hierarchical cosmogony predict a stronger (although consistent within the error bars) than observed evolution of the stellar mass-size relation. The observed luminosity-size evolution out to z ~ 2.5 matches well recent infall model predictions for Milky Way-type objects. For low- n galaxies, the evolution of the stellar mass-size relation would follow naturally if the individual galaxies grow inside out. For highly concentrated objects, the situation is as follows: at a given luminosity, these galaxies were ~2.7 ± 1.1 times smaller at z ~ 2.5 (or, put differently, were typically ~2.2 ± 0.7 mag brighter at a given size than they are today), and at a given stellar mass the size has evolved proportionally to (1 + z ) -0.45±0.10 .
Source: The Astrophysical Journal
DOI: 10.1086/506464
Authors: Ignacio Trujillo, Natascha M. Forster Schreiber, Gregory Rudnick, Marco Barden, Marijn Franx, Hans‐Walter Rix, J. A. R. Caldwell, Daniel H. McIntosh, Sune Toft, Boris Haussler, Andrew Zirm, Pieter G. van Dokkum, Ivo Labbe, Alan Moorwood, Huub Rottgering, Arjen van der Wel, Paul van der Werf, Lottie van Starkenburg
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, Princeton University, University of Washington, Johns Hopkins University, University of Pittsburgh, New Mexico State University, Bundesministerium für Bildung und Forschung, European Southern Observatory, Max-Planck-Institut für Astronomie, U.S. Naval Observatory, Fermilab, Los Alamos National Laboratory
OpenAlex ID: W2074768476