标题： 观测双星 显示英文标题

标题： Observing Binaries

摘要： 双星是由引力将两颗恒星物理上绑定在一起的动态系统。 双星是优先实验室，使人们能够测量恒星的基本属性，但也可能改变恒星的生存和死亡方式。 正因为如此，双星在天体物理学中一直扮演着核心角色。 在本章中，我们将重点关注双星的观测特性。 描述双星的基本量有哪些？ 我们如何探测和分类它们？ 对于不同类型的天体，我们可以限制哪些参数？ 显示英文摘要

摘要： Binary stars are dynamical systems formed by two stars that are physically bound by the gravitational force. Binary stars are privileged laboratories, allowing one to measure the fundamental properties of stars but also potentially changing the way stars live and die. Because of this, binary stars have continuously played a central role in astrophysics. In this chapter, we focus on the observational properties of binary stars. What are the fundamental quantities that describe binaries? How do we detect and classify them? Which parameters can we constrain for different type of objects?