标题： 脉冲星作为强场引力测试的实验室 显示英文标题

标题： Radio Pulsars as a Laboratory for Strong-field Gravity Tests

摘要： 广义相对论为引力和时空提供了一个经典描述，是现代物理的基石。它已经通过了多项实证测试，主要是在弱引力领域，但如今也包括强引力领域。射电脉冲星为引力测试提供了一个最早的太阳系外实验室。它们拥有强自引力天体，即中子星，在强场引力研究中扮演着独特角色。双星脉冲星的射电计时能够非常精确地测量系统参数，脉冲星计时技术对轨道动力学的各种变化极为敏感。如果一种替代引力理论相对于广义相对论导致双星轨道演化的改变，该理论的预测就可以与计时结果进行对比。在本章中，我们回顾了利用射电脉冲星进行强场引力测试的基本概念，并结合一些最近的例子，包括引力偶极辐射、大质量引力理论和强等效原理的测试。随着更多灵敏的射电望远镜投入使用，脉冲星将在不久的将来提供更加专门的强引力测试。 显示英文摘要

摘要： General relativity offers a classical description to gravitation and spacetime, and is a cornerstone for modern physics. It has passed a number of empirical tests with flying colours, mostly in the weak-gravity regimes, but nowadays also in the strong-gravity regimes. Radio pulsars provide one of the earliest extrasolar laboratories for gravity tests. They, in possession of strongly self-gravitating bodies, i.e. neutron stars, are playing a unique role in the studies of strong-field gravity. Radio timing of binary pulsars enables very precise measurements of system parameters, and the pulsar timing technology is extremely sensitive to various types of changes in the orbital dynamics. If an alternative gravity theory causes modifications to binary orbital evolution with respect to general relativity, the theory prediction can be confronted with timing results. In this chapter, we review the basic concepts in using radio pulsars for strong-field gravity tests, with the aid of some recent examples in this regard, including tests of gravitational dipolar radiation, massive gravity theories, and the strong equivalence principle. With more sensitive radio telescopes coming online, pulsars are to provide even more dedicated tests of strong gravity in the near future.