The rest-frame K-band luminosity function of galaxies in clusters to z = 1.3 Page: 3 of 20
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The rest-frame K-band luminosity function of galaxies in clusters
to z = 1.3
Roberto De Propris",, S. A. Stanford3'4, Peter R. Eisenhardt'6,
Brad P. Holden', Piero Rosati8
ABSTRACT
We derive the rest-frame K-band luminosity function for galaxies in 32 clus-
ters at 0.6 < z < 1.3 using deep 3.6pm and 4.5pm imaging from the Spitzer
Space Telescope InfraRed Array Camera (IRAC). The luminosity functions ap-
proximate the stellar mass function of the cluster galaxies. Their dependence on
redshift indicates that massive cluster galaxies (to the characteristic luminosity
MK) are fully assembled at least at z - 1.3 and that little significant accretion
takes place at later times. The existence of massive, highly evolved galaxies at
these epochs is likely to represent a significant challenge to theories of hierarchi-
cal structure formation where such objects are formed by the late accretion of
spheroidal systems at z < 1.
Subject headings: galaxies: luminosity function, mass function - galaxies: forma-
tion and evolution
1. Introduction
Clusters of galaxies are important for studies of galaxy formation and evolution, because
they contain a volume limited population of galaxies observed at the same cosmic epoch.
'Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
2Department of Physics, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom
3Department of Physics, University of California at Davis, 1 Shields Avenue, Davis, CA, 95616
4Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratories, L-413, Liv-
ermore, CA, 94550
'MS 169-327, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA, 91109
6California Institute of Technology, 1200 E. California Boulevard, Pasadena CA 91125
7Lick Observatory, University of California, Santa Cruz, CA, 95604
'European Southern Observatory, Karl Schwarzschild StraBe 2, 85748 Garching, Germany
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De Propris, R.; Stanford, S. A.; Eisenhardt, P. R.; Holden, B. P. & Rosati, P. The rest-frame K-band luminosity function of galaxies in clusters to z = 1.3, article, March 20, 2007; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc900519/m1/3/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.