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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