A "short" distance to the large magellanic cloud with the Hipparcos calibrated red clump stars

被引:77
作者
Stanek, KZ
Zaritsky, D
Harris, J
机构
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[2] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA
[3] UCO, Lick Observ, Santa Cruz, CA 95064 USA
基金
美国国家航空航天局; 美国国家科学基金会;
关键词
galaxies : distances and redshifts; galaxies : individual (Large Magellanic Cloud); solar neighborhood; stars : horizontal-branch;
D O I
10.1086/311420
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Following an approach developed by Paczynski & Stanek, we derive a distance to the Large Magellanic Cloud (LMC) by comparing red clump stars from the Hipparcos catalog with the red clump stars observed in two fields in the LMC that were selected from the ongoing photometric survey of the Magellanic Clouds to lie in low-extinction regions. The use of red clump stars allows a single step determination of the distance modulus to the LMC, mu(0,LMC) = 18.065 +/- 0.031 +/- 0.09 mag (statistical plus systematic error), and the corresponding distance, R-LMC = 41.02 +/- 0.59 +/- 1.74 kpc. This measurement is in excellent agreement with the recent determination by Udalski et al., also based on the red clump stars, but is similar to 0.4 mag smaller than the generally accepted value of mu(0,LMC) = 18.50 +/- 0.15 mag, We discuss possible reasons for this discrepancy and how it can be resolved.
引用
收藏
页码:L141 / L144
页数:4
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