The Distribution of High‐Redshift Galaxy Colors: Line‐of‐Sight Variations in Neutral Hydrogen Absorption | Zendy

Matthew A. Bershady | Zendy; Jane C. Charlton | Zendy; Janet M. Geoffroy | Zendy

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The Distribution of High‐Redshift Galaxy Colors: Line‐of‐Sight Variations in Neutral Hydrogen Absorption

Author(s) -

Matthew A. Bershady,

Jane C. Charlton,

Janet M. Geoffroy

Publication year - 1999

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 - 10.1086/307257

Subject(s) - physics , redshift , galaxy , astrophysics , opacity , spectral energy distribution , line of sight , luminosity , monte carlo method , hubble deep field , statistics , optics , mathematics

We model, via Monte Carlo simulations, the distribution of observed U-B, B-V,V-I galaxy colors in the range 1.75 10^18 cm^2 yield a limitingdistribution of high redshift galaxy colors. As one application of ouranalysis, we consider the sample completeness as a function of redshift for asingle spectral energy distribution (SED) given the multi-color selectionboundaries for the Hubble Deep Field proposed by Madau et al (1996). We arguethat the only correct procedure for estimating the z>3 galaxy luminosityfunction from color-selected samples is to measure the (observed) distributionof redshifts and intrinsic SED types, and then consider the variation in colorfor each SED and redshift. A similar argument applies to the estimation of theluminosity function of color-selected, high redshift QSOs.Comment: accepted for publication in ApJ; 25 pages text, 14 embedded figure

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