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The Rest‐Frame Optical Luminosity Functions of Galaxies at 2≤z≤3.5
Author(s) -
Danilo Marchesini,
Pieter van Dokkum,
Ryan Quadri,
Gregory Rudnick,
Marijn Franx,
P. Lira,
Stijn Wuyts,
Eric Gawiser,
Daniel Christlein,
Sune Toft
Publication year - 2007
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/510305
Subject(s) - astrophysics , physics , galaxy , luminosity , luminosity function , rest (music) , sample (material) , population , range (aeronautics) , stellar mass , stellar population , star formation , medicine , materials science , environmental health , composite material , thermodynamics , acoustics
We present the rest-frame optical (B, V, and R band) luminosity functions(LFs) of galaxies at 22 are consistent with those at z~0. The characteristicmagnitudes are significantly brighter than the local values (e.g., ~1.2 mag inthe R band), while the measured values for Phi_star are typically ~5 timessmaller. The B-band luminosity density at z~2.3 is similar to the local value,and in the R band it is ~2 times smaller than the local value. We present theLF of Distant Red Galaxies (DRGs), which we compare to that of non-DRGs. WhileDRGs and non-DRGs are characterized by similar LFs at the bright end, thefaint-end slope of the non-DRG LF is much steeper than that of DRGs. Thecontribution of DRGs to the global densities down to the faintest probedluminosities is 14%-25% in number and 22%-33% in luminosity. From the derivedrest-frame U-V colors and stellar population synthesis models, we estimate themass-to-light ratios (M/L) of the different subsamples. The M/L ratios of DRGsare ~5 times higher (in the R and V bands) than those of non-DRGs. The globalstellar mass density at 2

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