The K-band luminosity function of early-type galaxies

被引:0
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作者
Sharples, RM [1 ]
Gardner, JP [1 ]
Frenk, CS [1 ]
Carrasco, BE [1 ]
机构
[1] Univ Durham, Dept Phys, Durham, England
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P1 [天文学];
学科分类号
0704 ;
摘要
We present the first near-infrared K-band luminosity function of field galaxies derived from a wide field K-selected redshift survey. Preliminary best-fit Schechter function parameters are M* = -23.12 + 5log(h), alpha = -0.91, and phi* = 1.66 x 10(-2)h(3) Mpc(-3). The morphological mix as determined by multi-colour photometry is strongly biased towards early-type systems compared with B-selected surveys. Simple passive-evolution number count models based on this luminosity function fit the observed K counts over a range of more than 8 magnitudes (10 < K < 20) and indicate that the galaxies making up the K-band surveys were fully formed by z similar to 1, and have been passively evolving since then.
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页码:559 / 560
页数:2
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