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AN IMAGING K-BAND SURVEY - II: THE REDSHIFT SURVEY AND GALAXY EVOLUTION IN THE INFRARED. | Karl Glazebrook
; J.A. Peacock
; L. Miller
; C.A. Collins.
; | Date: |
24 Feb 1995 | Journal: | Mon.Not.Roy.Astron.Soc. 275 (1995) 169 | Subject: | astro-ph | Abstract: | We present a redshift survey of 124 galaxies, from an imaging $K$-band survey complete to $Ksimeq 17.3$. The optical-to-infrared colours are consistent with the range expected from synthetic galaxy spectra, although there are some cases of very red nuclei. Our data show no evidence for evolution of the $K$-band luminosity function at $z<0.5$, and the results are well described by a Schechter function with $M_K^*=-22.75pm0.13+5log_{10}h$ and $phi^*=0.026pm0.003h^3{
m Mpc^{-3}}$. This is a somewhat higher normalization than has been found by previous workers, and it removes much of the excess in faint $K$ and $B$ counts with respect to a no-evolution model. However, we do find evidence for evolution at $z>0.5$: $M_K^*$ is approximately 0.75 mag. brighter at $z=1$. This luminosity evolution is balanced by a reduced normalization at high redshift. The overall evolution is thus opposite to that expected in simple merger-dominated models. | Source: | arXiv, astro-ph/9502094 | Services: | Forum | Review | PDF | Favorites |
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