VARIABLE-STARS IN THE LEO A DWARF GALAXY (DDO-69)

被引：35

作者：

HOESSEL, JG

SAHA, A

KRIST, J

DANIELSON, GE

机构：

[1] SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218

[2] CALTECH 17025,PALOMAR OBSERV,PASADENA,CA 91125

来源：

ASTRONOMICAL JOURNAL | 1994年 / 108卷 / 02期

关键词：

D O I：

10.1086/117099

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Observations of the Leo A dwarf galaxy, obtained over the period from 1980 to 1991 are reported. Forty two separate CCD frames were searched for variable stars. A total of 14 suspected variables were found, 9 had sufficient coverage for period determination, and 5 had Cepheid light curves. Four of these stars fit well on a P-L relation and yield a distance modulus, after correction for Galactic foreground extinction, of m - M = 26.74. This corresponds to a distance of 2.2 Mpc, placing Leo A near the Local Group zero-velocity surface.

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页码：645 / &

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