氦白矮星与小质量主序星并合及脉动热亚矮星的形成
作者:
作者单位:

(北京师范大学天文系北京100875)

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(11703001), 中央高校基本科研业务费资助


Helium White Dwarf-main Sequence Star Merger and Formation of Pulsating Hot Subdwarf Stars
Author:
Affiliation:

( Department of Astronomy, Beijing Normal University, Beijing 100875)

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    sdBVrs型热亚矮星是一类特殊的热亚矮星, 观测显示它们同时具有p模和g模的脉动.目前这一类热亚矮星的演化起源仍然缺乏完备的解释.对氦白矮星与小质量主序星并合模型进行详细计算表明, 并合模型的结果符合sdBrs型热亚矮星的表面有效温度、重力加速度等观测特征, 并且能够激发出稳定的p模和g模脉动. 因此, 氦白矮星与小质量主序星并合是形成sdBrs型热亚矮星可能的渠道之一.

    Abstract:

    sdBrs is a particular type of hot subdwarfs which have both p-mode and g-mode pulsations.It is unclear of the formation channel of such hot subdwarfs stars.The merger of a He core white dwarf (HeWD) with a main sequence (MS) star can produce a hot subdwarf.We propose that sdBVrs may form from this channel.We compute the models of the remnants of some of these mergers, and perform detailed stability analysis.By comparing to observations, the evolutionary tracks of the remnants of mergers can match with the sdBV rs in surface gravity-effective temperature diagram.These models also have both p-mode and g-mode pulsations been excited.Our result indicates that the merger of a HeWD with a MS star might be one of the formation channels of sdBVrs stars.

    参考文献
    相似文献
    引证文献
引用本文

马旭东,张先飞.氦白矮星与小质量主序星并合及脉动热亚矮星的形成[J].天文学报,2020,61(2):19. MA Xu-dong, ZHANG Xian-fei. Helium White Dwarf-main Sequence Star Merger and Formation of Pulsating Hot Subdwarf Stars[J]. Acta Astronomica Sinica,2020,61(2):19.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-09-18
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2020-03-26
  • 出版日期: