A new kinematic distance estimator to the Large Magellanic Cloud

被引:8
作者
Gould, A [1 ]
机构
[1] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
关键词
astrometry; galaxies : distances and redshifts; Magellanic Clouds;
D O I
10.1086/308169
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The distance to the Large Magellanic Cloud (LMC) can be directly determined by measuring three of its properties: its radial velocity field, its mean proper motion, and the position angle phi(ph) of its photometric line of nodes. Statistical errors of similar to 2% are feasible based on proper motions obtained with any of several proposed astrometry satellites, the earliest possibility being the Full-Sky Astrometric Mapping Explorer (FAME). The largest source of systematic error is likely to be in the determination of phi(ph). I suggest two independent methods to measure phi(ph), one based on counts of clump giants and the other on photometry of clump giants. I briefly discuss a variety of methods to test for other sources of systematic errors.
引用
收藏
页码:156 / 160
页数:5
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