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Title:
The K-band luminosity function of nearby field galaxies
Authors:
Loveday, Jon
Affiliation:
AA(Department of Astronomy and Astrophysics, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 312, Issue 3, pp. 557-566. (MNRAS Homepage)
Publication Date:
03/2000
Origin:
MNRAS
MNRAS Keywords:
TECHNIQUES: PHOTOMETRIC, SURVEYS, GALAXIES: LUMINOSITY FUNCTION, MASS FUNCTION, COSMOLOGY: OBSERVATIONS<X>.</X>
DOI:
10.1046/j.1365-8711.2000.03179.x
Bibliographic Code:
2000MNRAS.312..557L

Abstract

We present a measurement of the K-band luminosity function (LF) of field galaxies obtained from near-infrared imaging of a sample of 345 galaxies selected from the Stromlo-APM Redshift Survey. The LF is reasonably well fitted over the 10-mag range -26<=MK<=-16 by a Schechter function with parameters α=-1.16+/-0.19, M*=-23.58+/-0.42 and φ*=0.012+/-0.008Mpc-3, assuming a Hubble constant of H0=100kms-1Mpc-1. We have also estimated the LF for two subsets of galaxies subdivided by the equivalent width of the Hα emission line at EW(Hα)=10Å. There is no significant difference in LF shape between the two samples, although there is a hint (~1σ significance) that emission-line galaxies (ELGs) have M* roughly 1mag fainter than non-ELGs. Contrary to the optical LF, there is no difference in faint-end slope α between the two samples.

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