HD 161306: a radiatively interacting Be binary?

P. Koubský

doi:10.1051/0004-6361/201424022

2014-07-10

DOI：10.1051/0004-6361/201424022

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摘要

En 中文

The spectrum of the Be star HD 161306 is shossai to Vary periodically with a period of similar to 100 days. The radial velocity of the Het 6678 A emission peak varying in antiphase to the radial velocity of the Ha emission wings component suggests that the star is a binary similar to phi Per, 59 Cyg, or FY CMa, i.e. a radiativelv interacting Be binary - a rare case among Be stars. This type of object is also called a phi Per-type binary or Be + sdO binaries. The range of radial-velocity variations of the strong emission peak in the helium line observed in HD 161306 is about 180 km s(-1), similar to what is observed for these systems. We therefore conclude that HD 161306 may represent another case of a Be star with a hot subdwarf companion.

Keyword:

binaries: spectroscopic

stars: emission-line, Be

stars: individual: HD 161306

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期刊

Astronomy and Astrophysics

IF:

5.8

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5.0W

被引数:

18.3W

机构

czech academy of sciences

学者数:

3.4W

论文数: 2.6W

被引数: 31

masaryk university brno

学者数:

1.1W

论文数: 7.8K

被引数: 9

Charles University Prague

学者数:

3.0W

论文数: 2.2W

被引数: 158

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