一颗新的缓慢脉动的亚矮星b: HD 4539

Third Coast Pub Date : 2007-08-01 DOI:10.1553/CIA151S67
C. Schoenaers, A. Lynas-Gray
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引用次数: 3

摘要

我们报告了在亚矮星b (sdB)恒星HD 4539中发现的慢脉冲光谱。它是sdB中最亮的恒星之一,因此被研究得很好。它的温度和重力将使它正好处于所谓的“Betsy”恒星(长周期sdB脉冲星)的位置,这一点已经被这篇论文首次报道的谱线变化的发现所证实。由于2005年和2006年获得的径向速度曲线的周期图分析得出了几个显著的频率,因此线廓线的变化很可能是脉动的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A new slowly pulsating subdwarf-B star: HD 4539
We report the spectroscopic discovery of slow pulsations in the subdwarf-B (sdB) star HD 4539. It is amongst the brightest sdB stars and, as such, has been well studied. Its temperature and gravity would place it squarely where the so-called “Betsy” stars (long-period sdB pulsators) are found, and this has been confirmed by the discovery of line-profile variations reported in this paper for the first time. As periodogram analyses of radial velocity curves obtained in 2005 and 2006 yield several significant frequencies, line-profile variations are very probably a consequence of pulsation.
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