Dwarf Cepheids in the Carina Dwarf Spheroidal Galaxy

被引：0
|
作者：
Vivas, A. K. [1 ]
Mateo, M. [2 ]
机构：
[1] Ctr Invest Astron CIDA, Apartado Postal 264, Merida 5101 A, Venezuela
[2] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
来源：
FIFTY YEARS OF WIDE FIELD STUDIES IN THE SOUTHERN HEMISPHERE: RESOLVED STELLAR POPULATIONS OF THE GALACTIC BULGE AND MAGELLANIC CLOUDS | 2015年 / 491卷
关键词：
RR LYRAE STARS; VARIABLE-STARS; GLOBULAR-CLUSTERS; DSPH GALAXY; PROJECT; HISTORY;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the results of a multi-epoch survey of the Carina dwarf spheroidal galaxy, carried out with the Blanco 4m telescope at CTIO, which covers the whole galaxy and extends up to a few tidal radii along its major axis. The cadence of the survey was especially designed to detect dwarf Cepheid stars, which are pulsating variables located similar to 2.5 mag below the horizontal branch. Carina turned out to be very rich in these types of stars. With 340 dwarf cepheids, Carina has the highest specific frequency among the dwarf spheroidal galaxies and globular clusters which have been searched for dwarf Cepheid stars. We also detected RR Lyrae stars and anomalous Cepheids in our observations. Several variables, of the three types, were found beyond the tidal radius of Carina.
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页码：359 / 365
页数：7
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