The stellar halo metallicity-luminosity relationship for spiral galaxies

被引：25

作者：

Renda, Agostino ^{[1
]}

Gibson, Brad K. ^{[1
,6
]}

Mouhcine, Mustapha ^{[2
]}

Ibata, Rodrigo A. ^{[3
]}

Kawata, Daisuke ^{[1
,7
]}

Flynn, Chris ^{[1
,4
]}

Brook, Chris B. ^{[1
,5
]}

机构：

[1] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[2] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[3] Observ Astron, F-67000 Strasbourg, France

[4] Tuorlan Observ, Piikkio 21500, Finland

[5] Univ Laval, Dept Phys Genie Phys & Opt, Quebec City, PQ G1K 7P4, Canada

[6] Monash Univ, Sch Math Sci, Clayton, Vic 3800, Australia

[7] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2005年 / 363卷 / 01期

基金：

澳大利亚研究理事会; 日本学术振兴会;

关键词：

methods: numerical; galaxies: evolution; galaxies: formation; galaxies: haloes; galaxies: structure;

D O I：

10.1111/j.1745-3933.2005.00075.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The stellar haloes of spiral galaxies bear important chemodynamical signatures of galaxy formation. We present here the analysis of 89 semi-cosmological spiral galaxy simulations, spanning similar to 4 mag in total galactic luminosity. These simulations sample a wide variety of merging histories and show significant dispersion in halo metallicity at a given total luminosity more than a factor of 10 in metallicity. Our preliminary analysis suggests that galaxies with a more extended merging history possess haloes which have younger and more metal-rich stellar populations than the stellar haloes associated with galaxies with a more abbreviated assembly. A correlation between a halo's metallicity and its surface brightness has also been found, reflecting the correlation between halo metallicity and its stellar mass. Our simulations are compared with recent Hubble Space Telescope observations of resolved stellar haloes in nearby spirals.

引用

页码：L16 / L20

页数：5

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