...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Astronomica: An International Quarterly Journal >The Clusters AgeS Experiment (CASE). Variable Stars in the Field of the Globular Cluster NGC 3201
【24h】

The Clusters AgeS Experiment (CASE). Variable Stars in the Field of the Globular Cluster NGC 3201

机译：集群年龄实验（CASE）。球状星团NGC 3201领域中的变星

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The field of the globular cluster NGC 3201 was monitored between 1998 and 2009 in a search for variable stars. BV light curves were obtained for 152 periodic or likely periodic variables, fifty-seven of which are new detections. Thirty-seven newly detected variables are proper motion members of the cluster. Among them we found seven detached or semi-detached eclipsing binaries, four contact binaries, and eight SX Phe pulsators. Four of the eclipsing binaries are located in the turnoff region, one on the lower main sequence and the remaining two slightly above the subgiant branch. Two contact systems are blue stragglers, and another two reside in the turnoff region. In the blue straggler region a total of 266 objects were found, of which 140 are proper motion (PM) members of NGC 3201, and another nineteen are field stars. Seventy-eight of the remaining objects for which we do not have PM data are located within the half-light radius from the center of the cluster, and most of them are likely genuine blue stragglers. Four variable objects in our field of view were found to coincide with X-ray sources: three chromospherically active stars and a quasar at a redshift z approximate to 0.5.
机译：为了寻找变星，在1998年至2009年之间对球状星团NGC 3201的场进行了监测。获得了152个周期或可能的周期变量的BV光曲线，其中57个是新检测到的。 37个新检测到的变量是群集的适当运动成员。其中，我们发现了七个分离或半分离的日食二进制文件，四个接触二进制文件和八个SX Phe脉动器。蚀食二进制文件中的四个位于关闭区域，一个位于较低的主序列上，其余两个位于子分支上方。两个接触系统是蓝色散流器，另外两个位于关闭区域。在蓝色散布者区域，共发现266个天体，其中140个是NGC 3201的正常运动（PM）成员，另外19个是野外恒星。我们没有PM数据的其余剩余物体中，有78个位于从星团中心起半光半径范围内，其中大多数可能是真正的蓝色散落物。发现我们视野中有四个可变物体与X射线源相一致：三个色球活动恒星和一个红移z近似于0.5的类星体。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号