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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >A significant feature in the general relativistic time evolution of the redshift of photons coming from a star orbiting Sgr A*
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A significant feature in the general relativistic time evolution of the redshift of photons coming from a star orbiting Sgr A*

机译：来自轨道轨道SGR A的光子射频的一般相对论时间演变的一个重要特征

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摘要

The star S0-2, orbiting the Galactic central massive black hole candidate Sgr A*, passed its pericenter in 2018 May. This event is the first chance to detect the general relativistic (GR) effect of a massive black hole, free from non-gravitational physics. The observable GR evidence in the event is the difference between the GR redshift and the Newtonian redshift of photons coming from S0-2. Within the present observational precision, the first post-Newtonian (1PN) GR evidence is detectable. In this paper, we give a theoretical analysis of the time evolution of the 1PN GR evidence, under a presupposition that is different from used in previous papers. Our presupposition is that the GR/Newtonian redshift is always calculated with the parameter values (the mass of Sgr A*, the initial conditions of S0-2, and so on) determined by fitting the GR/Newtonian motion of S0-2 with the observational data. It is then revealed that the difference of the GR redshift and the Newtonian one shows two peaks before and after the pericenter passage. This double-peak appearance is due to our presupposition, and reduces to a single peak if the same parameter values are used in both GR and Newtonian redshifts as considered in previous papers. In addition to this theoretical discussion, we report our observational data obtained with the Subaru telescope by 2018. The quality and the number of Subaru data in 2018 are not sufficient to confirm the detection of the double-peak appearance.
机译：S0-2星级，绕银河中央大规模黑洞候选人SGR A *，于2018年通过其围流。这个事件是检测巨大的黑洞的一般相对论（GR）效应的第一机会，没有来自非引力物理学。该活动中可观察的GR证据是GR红移与来自S0-2的光子的纽托尔红街之间的差异。在目前的观察精度内，第一个后牛顿（1PN）GR证据是可检测的。在本文中，我们在不同于先前论文中使用的预设中，我们对1PN GR证据的时间演变的理论分析。我们的预设是通过拟合S0-2的GR / Newtonian运动来确定GR / Newtonian Redshift始终用参数值（S0-2的质量为S0-2，S0-2的初始条件）计算观察数据。然后揭示了GR红移和牛顿人的差异在围绕围绕后和之后的两个峰。这种双峰外观是由于我们的预设，如果在先前论文中考虑的GR和Newtonian Redshifts中使用相同的参数值，则将其降低到单个峰值。除了这个理论讨论之外，我们还向2018年通过斯巴鲁望远镜获得了我们的观察数据。2018年的副库数据的质量和数量不足以确认检测双峰外观。

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