论文标题
重力质量的脉冲星测试
Pulsar tests of the graviton mass
论文作者
论文摘要
在爱因斯坦的一般相对论（GR）中，重力由无质量的自旋2度量场来描述，而GR的扩展为重力的质量术语包括对引力和宇宙学的深刻含义。除了在太阳系中进行的重力实验以及最近具有重力波（GWS）的重力实验外，PULSAR的时机观察还提供了一种互补的手段来测试重力的无质量性。 In this contribution, I overview three methods in probing the mass of graviton from precision timing of binary pulsars via the modified gravitational radiation (hence, the observed damping rate of the orbital period), as well as from the pulsar-timing-array (PTA) experiments via the modified Hellings-Downs angular-correlation curve.这些测试在其运动学和动力学中探测了引力的不同方面，补充了其他类型的测试，并为重力理论提供了宝贵的信息。
In Einstein's general relativity (GR), gravity is described by a massless spin-2 metric field, and the extension of GR to include a mass term for the graviton has profound implication for gravitation and cosmology. Besides the gravity experiments carried out in the Solar System and those recently with gravitational waves (GWs), pulsar timing observations provide a complementary means to test the masslessness of graviton. In this contribution, I overview three methods in probing the mass of graviton from precision timing of binary pulsars via the modified gravitational radiation (hence, the observed damping rate of the orbital period), as well as from the pulsar-timing-array (PTA) experiments via the modified Hellings-Downs angular-correlation curve. These tests probe different aspects of gravitation in its kinematics and dynamics, complementing tests of other kinds and providing valuable information to the fundamental theory of gravity.
