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Low Surface Brightness Galaxies and the Field Galaxy Luminosity Function

Published online by Cambridge University Press:  25 May 2016

D. Sprayberry ,
C. D. Impey ,
G. D. Bothun  and
M. J. Irwin
D. Sprayberry
Affiliation:
Kapteyn Laboratorium, Postbus 800, 9700 AV Groningen, NL
C. D. Impey
Affiliation:
Steward Observatory
G. D. Bothun
Affiliation:
Dept. of Physics, Univ. of Oregon
M. J. Irwin
Affiliation:
RGO

Extract

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We have developed a catalog of local low surface brightness galaxies (LSBGs) which is selected by objective criteria. We present here a luminosity function (LF) for LSBGs based on that catalog. This LF includes the effects of the completeness corrections to the LSBG catalog, and includes only galaxies with surface brightnesses (22.25 ≤ μB (0) ≤ 24.5) fainter than those included in the CfA Redshift Survey (see Marzke et al. 1994, AJ 108, 437). The best-fitting Schechter function has parameters α = –1.42, M∗B = −18.34, and Φ∗ = 0.0036 h 3 Mpc–3 mag–1. Thus, surveys which do not take account of the observational selection bias imposed by surface brightness are missing a substantial fraction of the local galaxies, but, this missed fraction is not large enough to explain the counts of faint blue galaxies observed at moderate redshift.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 446
Copyright
Copyright © Kluwer 1996