Estimation of the dust mass-loss rates from AGB stars in the Fornax and Sagittarius dwarf spheroidal galaxies

被引：0

作者：

Lagadec, Eric ^{[1
]}

Zijlstra, Albert A. ^{[1
]}

Matsuura, M. ^{[2
]}

Whitelock, Patricia A. ^{[3
]}

van Loon, Jacco Th. ^{[4
]}

机构：

[1] Univ Manchester, Sch Phys & Astron, Sackville St Bldg,POB 88, Manchester M60 1QD, Lancs, England

[2] Natl Astron Observ Japan, Tokyo, Japan

[3] Univ Cape Town, Rondebosch, South Africa

[4] Univ Keele, Keele, Staffs, England

来源：

WHY GALAXIES CARE ABOUT AGB STARS: THEIR IMPORTANCE AS ACTORS AND PROBES | 2007年 / 378卷

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

To study the effect of metallicity on the mass-loss of AGB stars, we have conducted mid-infrared photometric measurements of AGB stars in the Sagittarius and Fornax dwarf spheroidal galaxies ([Fe/H] = -1.1 and -1.3) with the 10 mu m camera VISIR at the VLT. These observations, combined with previous near-infrared photometric measurements, allow us to estimate mass-loss rates in these galaxies. We show here that the observed AGB stars display dust-driven mass-loss. Dust mass-loss rates are found to be in the range 6 x 10(-10) - 4.4 x 10(-8) M-circle dot yr(-1) for the observed AGB stars in SgrD and around 2 x 10(-8) M-circle dot yr(-1) for the star observed in Fornax.

引用

页码：268 / +

页数：3

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