INFRARED COLORS OF A COMPLETE SAMPLE OF FAINT GALAXIES

被引：21

作者：

ELLIS, RS ^{[1
]}

ALLEN, DA ^{[1
]}

机构：

[1] ANGLO AUSTRALIAN OBSERV,EPPING,NSW 2121,AUSTRALIA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1983年 / 203卷 / 02期

关键词：

Color;

D O I：

10.1093/mnras/203.3.685

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We re-examine the infrared colour—redshift relation for galaxies of known redshift. The relation defined by measurements of optically selected galaxies lies fairly close to that expected from model predictions. Infrared colours may therefore offer a reasonable method for separating the effects of luminosity evolution and redshift when discussing optically selected samples of faint field galaxies. We apply this method to a complete sample of 47 field galaxies at optical magnitude 21.5. The infrared and optical data imply that a third of the field galaxies lie at redshifts beyond those expected from non-evolution models. The optical-to-infrared colours of these distant galaxies are generally bluer and the entire sample is consistent with a more vigorous star formation rate beyond a redshift of ~ 0.5. © Royal Astronomical Society.

引用

页码：685 / 693

页数：9