期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 406, 期 1, 页码 626-633出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2010.16704.x
关键词
planetary nebulae: general; binaries: general; planetary nebulae: individual: PN G222; 8-04; 2
资金
- MNiSW of Poland [N 203 024 31/3879]
- STFC [ST/F003196/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F003196/1] Funding Source: researchfish
A sample of 33 [WR] and wels (weak emission-line central stars) central stars of planetary nebulae was observed in order to search for binary nuclei. One close binary system was discovered. The central star of PN G222.8 - 04.2 is the first [WR] star in a close binary system known, with a period of 0.63 d. The fraction of close binary central stars, leading to photometrical variability, is lower among the hydrogen-poor [WR] stars and wels than among their hydrogen-rich counterparts. This may indicate larger orbital separations or an intrinsically lower binary fraction among [WR] and wels central stars. The detection of one close binary system among the [WR] stars shows that common-envelope evolution does not preclude such stars. It also shows that although a stellar merger is a possible evolutionary channel towards H-poor emission-line stars, it cannot form the only such channel, as PN G222.8 - 04.2 has avoided a merger.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据