Stellar chronology with white dwarfs in wide binaries
Stellar chronology with white dwarfs in wide binaries
复制标题
宽双星中白矮星的恒星年表
DOI：
10.1017/s1743921309031950
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
E. García–Berro
中科院分区：
文献类型：
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作者：
S. Catal'an;A. Garc'es;Ignasi Ribas;J. Isern;E. García–Berro
摘要白色矮星是中低质量恒星演化的最终产物。白色矮星的演化可以理解为一个冷却过程，目前这一点相对来说是众所周知的。因此，包含白色矮星的宽双星是限制恒星年龄的有力工具。我们研究了几个含有白色矮星的宽双星，目的有两个：当白色矮星的伴星的年龄可以精确测定时，我们利用这颗双星来提高对白色矮星成员的认识。相反，如果伴星是一颗没有年龄指标的低质量星星，白色矮星成员本身就被用来校准系统的年龄。在这方面的贡献，我们提出了一些结果，使用这两种方法来限制年龄的宽二进制。
Abstract White dwarfs are the evolutionary end product of stars with low and intermediate masses. The evolution of white dwarfs can be understood as a cooling process, which is relatively well known at the moment. For this reason, wide binaries containing white dwarfs are a powerful tool to constrain stellar ages. We have studied several wide binaries containing white dwarfs with two different purposes: when the age of the companion of the white dwarf can be determined with accuracy, we use the binary to improve the knowledge about the white dwarf member. On the contrary, if the companion is a low-mass star with no age indicator available, the white dwarf member itself is used to calibrate the age of the system. In this contribution we present some results using both methodologies to constrain the ages of wide binaries.