Hot white dwarfs and pre-white dwarfs discovered with SALT
Hot white dwarfs and pre-white dwarfs discovered with SALT
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用 SALT 发现热白矮星和前白矮星
DOI：
10.1093/mnras/stac3531
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发表时间：
2023
影响因子：
4.8
通讯作者：
Jeffery C
中科院分区：
文献类型：
--
作者：
Jeffery C
南部非洲大型望远镜对富氦热次矮星的巡天旨在探索高度演化恒星群之间的演化路径。选择标准意味着几颗热白色矮星和相关天体也被包括在内。本文报道了八颗新的超热白色矮星和前白色矮星的发现和分析。它们包括两颗PG 1159星、一颗DO白色矮星、三颗O（He）星和两颗O（H）星。其中一颗O（H）星是一个新发现的行星状星云的中心星星，另一颗是最热的“裸露”O（H）星星。这两颗PG 1159恒星都是GW Vir变星，其中一颗是测量到的最热的GW Vir星星，也是脉动稳定性模型的关键测试。DO白色矮星也是同类中最热的。
The Southern African Large Telescope survey of helium-rich hot subdwarfs aims to explore evolutionary pathways among groups of highly evolved stars. The selection criteria mean that several hot white dwarfs and related objects have also been included. This paper reports the discovery and analysis of eight new very hot white dwarf and pre-white dwarf stars with effective temperatures exceeding 100 000 K. They include two PG1159 stars, one DO white dwarf, three O(He), and two O(H) stars. One of the O(H) stars is the central star of a newly discovered planetary nebula, and the other is the hottest ‘naked’ O(H) star. Both of the PG1159 stars are GW Vir variables, one being the hottest GW Vir star measured and a crucial test for pulsation stability models. The DO white dwarf is also the hottest in its class.