Logo image
Back
THE OPTICAL LUMINOSITY FUNCTION OF VOID GALAXIES IN THE SDSS AND ALFALFA SURVEYS
Journal article   Open access

THE OPTICAL LUMINOSITY FUNCTION OF VOID GALAXIES IN THE SDSS AND ALFALFA SURVEYS

Crystal M Moorman, Michael S Vogeley, Fiona Hoyle, Danny C Pan, Martha P Haynes and Riccardo Giovanelli
The Astrophysical journal, v 810(2), pp 1-11
03 Sep 2015
DOI: https://doi.org/10.1088/0004-637X/810/2/108
url
http://arxiv.org/abs/1508.04199View
SubmittedOpen Access (License Unspecified),  Open

Abstract

cosmology: observations galaxies: luminosity function, mass function large-scale structure of universe methods: data analysis methods: statistical
ABSTRACT We measure the r-band galaxy luminosity function (LF) across environments over the redshift range 0 < z < 0.107 using the Sloan Digital Sky Survey (SDSS). We divide our sample into galaxies residing in large-scale voids (void galaxies) and those residing in denser regions (wall galaxies). The best-fitting Schechter parameters for void galaxies are log(Mpc−3), = −19.88 0.05, and = −1.20 0.02. For wall galaxies, the best-fitting parameters are log(Mpc−3), = −20.80 0.03, and = −1.16 0.01. We find a shift in the characteristic magnitude, , toward fainter magnitudes for void galaxies and find no significant difference between the faint-end slopes of the void and wall galaxy LFs. We investigate how low-surface-brightness selection effects can affect the galaxy LF. To attempt to examine a sample of galaxies that is relatively free of surface-brightness selection effects, we compute the optical galaxy LF of galaxies detected by the blind H i survey Arecibo Legacy Fast ALFA (ALFALFA). We find that the global LF of the ALFALFA sample is not well fit by a Schechter function because of the presence of a wide dip in the LF around Mr = −18 and an upturn at fainter magnitudes ( ∼ −1.47). We compare the H i selected r-band LF to various LFs of optically selected populations to determine where the H i selected optical LF obtains its shape. We find that sample selection plays a large role in determining the shape of the LF.

Metrics

8 Record Views
31 citations in Web of Science
29 citations in Scopus

Details

InCites Highlights

Data related to this publication, from InCites Benchmarking & Analytics tool:

Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Astronomy & Astrophysics
Logo image