论文标题
明亮的SDB星级没有密切的伴侣
No close companions to a sample of bright sdB stars
论文作者
论文摘要
在本文中，我们介绍了8个显而易见的单个subdwarf b星的同伴质量的上限，这些量来自于竖琴-N光谱获得的高精度径向速度测量值。这些限制对应于几个木星质量，表明这些恒星没有密切的伴侣，并保持尚未解决的机制问题，该机制几乎完全损失了这些恒星的巨型前体的信封。对于具有较大数据覆盖率的4颗恒星，也可以将上限设置为更大轨道中更大的伴侣的质量。
In this article we present preliminary results on the upper limits to the mass of a companion for 8 apparently single subdwarf B stars, derived from high-precision radial velocity measurements obtained from Harps-N spectra. These limits, corresponding to a few Jupiter masses, show that these stars do not have close companions and keep open the unresolved question of the mechanism that caused the almost complete loss of the envelope for the giant precursors of these stars. For 4 stars with a larger data coverage, it was also possible to set upper limits to the mass of a more massive companion in a wider orbit.
