A Complete Galaxy Redshift Survey - Part Five - Infrared Luminosity Functions for Field Galaxies

Details A Complete Galaxy Redshift Survey - Part Five - Infrared Luminosity Functions for Field Galaxies A Complete Galaxy Redshift Survey - Part Five - Infrared Luminosity Functions for Field Galaxies

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.263..560m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 263, NO. 3/AUG1, P. 560, 1993

Astronomy and Astrophysics

Astronomy

131

Scientific paper

A subsample of the optically selected Anglo-Australian Redshift Survey, which we have observed at infrared wavelengths, is used to construct the first infrared luminosity function for `field' galaxies. Infrared completeness limits for the survey are estimated using a V/V_max_ test in order to obtain a sample complete in the K (2.2 micron) passband, from which luminosity function parameters are derived using standard techniques. A new statistical method is then developed to construct the infrared luminosity function from the full optically selected survey, and possible sources of bias in this technique are examined. The best estimates of the infrared Schechter luminosity function parameters are M_K_^*^ = -25.1 +/- 0.3 and a=-1.0 +/- 0.3 for H_0_ = 50 km s^-1^ Mpc^-1^. We find that E/S0 and spiral galaxies have identical infrared luminosity functions to within the errors. This is interpreted in terms of a similar formation and evolutionary history for E/S0s and spiral bulges. The infrared luminosity functions are then used to predict number-magnitude counts at 2.2 microns. The best agreement between the observed and predicted counts is obtained for no-evolution models with q_0_ ~ 0.02 and a normalization of φ^*^ = (0.14+/-0.02)x 10^-2^ (H_0_/50)^3^ Mpc^-3^.

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