Detection of a white dwarf companion to the Hyades stars HD 27483
Detection of a white dwarf companion to the Hyades stars HD 27483
复制标题
探测到毕宿星的白矮星伴星 HD 27483
DOI：
--
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
E. Boehm
中科院分区：
文献类型：
--
作者：
E. Boehm
我们用IUE观测到毕宿F6 V双星HD 27483的一颗白色矮星（WD）伴星。这个系统是由两颗几乎相等的恒星组成的近距离双星，轨道周期为3.05天。我们的IUE观测揭示了第三颗星星的存在，这是一颗白色矮星，有效温度为23，000 +/- 1000 K，质量约为0.6太阳质量。它存在于毕宿星团中，并且已知其年龄，这使我能够推导出它的祖先的质量，它必须是大约2.3个太阳质量。双星系统中白色矮星的存在开启了一种可能性，即WD祖先排出的一些包层物质可能已经被F6恒星收集。因此，我们可能能够研究F6同伴表面上已知质量的WD祖先的丰度异常。
We observed with IUE a white dwarf (WD) companion to the Hyades F6 V binary stars HD 27483. This system is known to be a close binary of two nearly equal stars with an orbital period of 3.05 days. Our IUE observations revealed the presence of a third star, a white dwarf with an effective temperature of 23,000 +/- 1000 K and a mass of approximately 0.6 solar mass. Its presence in the Hyades cluster with a known age permits me to derive the mass of its progenitor, which must have been about 2.3 solar masses. The presence of the white dwarf in a binary system opens the possibility that some of the envelope material, which was expelled by the WD progenitor, may have been collected by the F6 stars. We may thus be able to study abundance anomalies of the WD progenitor with known mass on the surface of the F6 companions.