Mid infrared colors of early type galaxies

被引：8

作者：

Bressan, A ^{[1
]}

Aussel, H

Granato, GL

Rodighiero, G

Panuzzo, P

Silva, L

机构：

[1] Osserv Astron Padova, Padua, Italy

[2] Dipartimento Astron, I-35122 Padua, Italy

[3] SISSA, I-34014 Trieste, Italy

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2001年 / 277卷 / Suppl 1期

关键词：

AGB stars : dust; galaxies : stellar content; infrared : galaxies;

D O I：

10.1023/A:1012747022829

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compare the mid infrared colors of early type galaxies with isochrones that suitably account for the effects of dust in the circumstellar envelopes of AGB stars. We show that these stars affect significantly the integrated colors in the ISO bands. The excess at 10 mum observed in some early type galaxies combined with the optical spectrum, is compatible with a 100% old metal rich population. Limits on the additional young components are: age 0.2 Gyr, mass=0.5% and E(B-V)greater than or equal to0.5 or age 3 Gyr, mass 10% and E(B-V)greater than or equal to0.2.

引用

页码：251 / 254

页数：4

共 9 条

[1]

BREGMAN JN, 1998, AAS, V193, P903

[2]

Bressan A, 1998, ASTRON ASTROPHYS, V332, P135

[3] SPECTROPHOTOMETRIC EVOLUTION OF ELLIPTIC GALAXIES .1. ULTRAVIOLET EXCESS AND COLOR-MAGNITUDE-REDSHIFT RELATIONS [J].