论文标题
毫秒脉冲星/中间质量比二进制系统中的无线电时间安排
Radio timing in a millisecond pulsar-extreme/intermediate mass ratio binary system
论文作者
论文摘要
在银河中心黑洞（BH）或球形簇中心的BH绕轨道上的毫秒脉冲星观测到无线电定时观察可以回答天体物理学和基本物理学中的基础问题。 Pulsar射电天文学通常采用后言后近似来确定系统参数。但是，在中央BH周围的强力场上，高阶相对论效应可能变得重要。我们比较了后言近近似值给出的脉冲星时间延迟与相对论时间模型给出的脉冲时间延迟。与完全相对论的解决方案相比，我们发现为爱因斯坦延迟得出的解决方案与传播延迟（即Roemer和Sharpiro延迟）之间存在显着差异。纠正这些高阶相对论效应对于为了在银河中心和球状簇中心构建准确的无线电定时模型，并告知与其检测有关的问题。
Radio timing observations of a millisecond pulsar in orbit around the Galactic centre black hole (BH) or a BH at the centre of globular clusters could answer foundational questions in astrophysics and fundamental physics. Pulsar radio astronomy typically employs the post-Keplerian approximation to determine the system parameters. However, in the strong gravitational field around the central BH, higher order relativistic effects may become important. We compare the pulsar timing delays given by the post-Keplerian approximation with those given by a relativistic timing model. We find significant discrepancies between the solutions derived for the Einstein delay and the propagation delay (i.e. Roemer and Sharpiro delay) compared to the fully relativistic solutions. Correcting for these higher order relativistic effects is essential in order to construct accurate radio timing models for pulsar systems at the Galactic centre and the centre of globular clusters and informing issues related to their detection.
