Radial velocities, metallicities, and distances of Cepheids in M31 and M33

被引:0
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作者
Forestell, AD [1 ]
Barnes, TG [1 ]
Sneden, C [1 ]
Moffett, TJ [1 ]
机构
[1] Univ Texas, Dept Astron, Austin, TX 78712 USA
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中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Cepheid variable stars are fundamental to the calibration of the extragalactic distance scale. We present radial velocities, preliminary metallicities, and preliminary surface brightness distances of Cepheids in Local Group galaxies M31 and M33 using data obtained with the High Resolution Spectrograph on the Hobby-Eberly Telescope at McDonald Observatory. These data are the first step toward surface brightness distance measurements and metallicity calibrations of these extragalactic Cepheids.
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页码:99 / 102
页数:4
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