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The Luminosity Function of Void Galaxies in the Sloan Digital Sky Survey

Fiona Hoyle·Randall R. Rojas·Michael S. Vogeley·John Brinkmann
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Abstract

(Abridged) The Sloan Digital Sky Survey now extends over a large enough region that galaxies in low density environments can be detected. Rojas et al. have developed a technique to extract more than 1000 void galaxies with delta rho/rho < -0.6 on scales r>7 h^{-1} Mpc from the SDSS. In this paper, we present the luminosity function of these galaxies and compare it to that of galaxies at higher densities. We obtain a measurement of the void galaxy luminosity function over the range -21.5 5A wall galaxies is very similar in shape to that of the void galaxies, with only slightly brighter M_r* values and similar values of alpha. The value of alpha ~ -1.2 found from the void galaxy LF is shallower that that found from CDM models, suggesting that voids are not filled with a large population of dwarf galaxies.

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Fiona Hoyle, Randall R. Rojas, Michael S. Vogeley, John Brinkmann. 2003-09-26. The Luminosity Function of Void Galaxies in the Sloan Digital Sky Survey. https://doi.org/10.1086/427176

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