The local space density of dwarf galaxies

被引：51

作者：

Loveday, J

机构：

[1] Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637

来源：

ASTROPHYSICAL JOURNAL | 1997年 / 489卷 / 01期

关键词：

cosmology; observations; galaxies; distances and redshifts; evolution; luminosity function; mass function; surveys;

D O I：

10.1086/304778

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We estimate the luminosity function of field galaxies over a range of 10 mag (-22 < M-BJ < -12 for H-0 = 100 km s(-1) Mpc(-1)) by counting the number of faint APM galaxies around Stromlo-APM redshift survey galaxies at known distance. The faint end of the luminosity function rises steeply at M-BJ approximate to -15, implying that the space density of dwarf galaxies is at least 2 times larger than predicted by a Schechter function with flat faint-end slope. Such a high abundance of dwarf galaxies at low redshift can help explain the observed number counts and redshift distributions of faint galaxies without invoking exotic models for galaxy evolution.

引用

页码：29 / 36

页数：8

共 31 条

[1] ON DWARF ELLIPTIC GALAXIES AND THE FAINT BLUE COUNTS [J].