|
|||||
|
|
A new red variable star in the globularcluster M4 |
|
| Authors: | Yao Bao-an Sheng Chang-jung Zhang Chun-sheng Lin Qing |
| Institution: | 1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China 2Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China |
| Abstract: | G302 = L3107 is a red star located at the lowest end of the red giant branch of the globular cluster M4. According to its location on the C-M diagram, G302 may be a cluster member. No proper motion or radial velocity determinations are available up to date. We discovered that C302 is a new variable star with a main period of 1.24719 day and a peak to peak amplitude of about 0.3 mag in V. It may have a second period of 2.38249 day with an amplitude of about 0.05 mag. If it is a cluster member, then there will be interesting implications for the the theory of stellar evolution. |
| Keywords: | stars variables—globular cluster M4 |
| 本文献已被 ScienceDirect 等数据库收录！ | |