The distance to the Leo I dwarf spheroidal galaxy from the red giant branch tip

被引：59

作者：

Bellazzini, M

Gennari, N

Ferraro, FR

Sollima, A

机构：

[1] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy

[2] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 354卷 / 03期

关键词：

stars : Population II; galaxies : distances and redshifts; Local Group;

D O I：

10.1111/j.1365-2966.2004.08226.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present V and I photometry of a 9.4x9.4 arcmin(2) field centred on the dwarf spheroidal galaxy Leo I. The I magnitude of the tip of the red giant branch (RGB) is robustly estimated from two different data sets (I-TRGB=17.97(-0.03)(+0.05)). From this estimate, adopting [M/H]similar or equal to-1.2 from the comparison of RGB stars with Galactic templates, we obtain a distance modulus (m-M)(0)=22.02+/-0.13, corresponding to a distance D=254(-19)(+16) kpc.

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收藏

页码：708 / 712

页数：5

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