黑洞-脉冲星系统强引力中的光传播效应

发布时间：2018-03-11 02:18

本文选题：银心　切入点：脉冲星-黑洞双星　出处：《中国科学:物理学力学天文学》2015年02期 　论文类型：期刊论文

【摘要】：脉冲星是宇宙中最精确的时钟,其信号周期的精确度能够超过原子钟;它发出的脉冲在到达地球的过程中,如果途径黑洞附近,会被强引力场弯曲,原则上可以通过观测接收到的脉冲来研究黑洞和强引力场的性质.我们以围绕银河系中心超大质量黑洞做圆周运动的脉冲星为研究对象,分析了强引力场对脉冲路径的影响和脉冲到达时间的延迟.结果表明,脉冲轨迹和时延敏感依赖于观测者的观测倾角.观测角越大,强引力场效应就越显著.相比于黑洞的引力质量,黑洞自旋对结果的影响较小;当观测者偏离脉冲星轨道平面较大,即观测角较小时,黑洞的自旋效应明显变小;因此,需要借助高精度和灵敏度的望远镜来探究黑洞自旋的影响.
[Abstract]:Pulsars are the most accurate clocks in the universe, and their signal cycles can be more accurate than atomic clocks; the pulses it emits as it reaches Earth, if it passes near a black hole, is bent by a strong gravitational field. In principle, the properties of black holes and strong gravitational fields can be studied by observing the received pulses. We study pulsars that circle around supermassive black holes in the center of the Milky way. The influence of strong gravitational field on the pulse path and the delay of the pulse arrival time are analyzed. The results show that the sensitivity of the pulse trajectory and the time delay depends on the observational inclination angle of the observer, and the larger the observation angle is, The stronger the gravitational field effect is, the less the effect of black hole spin is on the result compared with the gravitational mass of the black hole, and when the observer deviates from the plane of the pulsar orbit, that is, the smaller the observation angle, the smaller the spin effect of the black hole is. High precision and sensitivity telescopes are needed to explore the effects of black hole spin.
【作者单位】：中国科学技术大学天文学系;中国科学院星系与宇宙学重点实验室;
【基金】：国家重点基础研究发展计划(编号:2012CB821801) 中国科学院战略性先导科技专项(B类)(编号:XDB09000000)资助项目
【分类号】：P145.6;P145.8

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