OJ287黑洞双星中引力波反作用的高精度测量
High accuracy measurement of gravitational wave back-reaction in the OJ287 black hole binary
摘要：
Blazar OJ 287每12年至少会出现两次大的热耀斑。利用准开普勒偏心黑洞双星模型成功地预测了这些耀斑的时间，其中次级黑洞撞击初级黑洞的吸积盘，产生热耀斑。对历史光变曲线的新测量与2015年11月/12月耀斑的观测相结合，以确定自1886年以来的撞击记录，并限制双星的轨道。轨道解表明双星周期现在是12.062年，以每世纪36天的速度减少。这对应于引力波的能量损失比标准四极引力波（GW）发射预测的速率低6.5 ± 4%。我们表明，这种差异是由于高阶引力辐射反应项，其中包括占主导地位的顺序尾巴的贡献。
英文摘要：
Blazar OJ287 exhibits large thermal flares at least twice every 12 years. The times of these flares have been predicted successfully using the model of a quasi-Keplerian eccentric black hole binary where the secondary impacts the accretion disk of the primary, creating the thermal flares. New measurements of the historical light curve have been combined with the observations of the 2015 November/December flare to identify the impact record since year 1886, and to constrain the orbit of the binary. The orbit solution shows that the binary period, now 12.062 year, is decreasing at the rate of 36 days per century. This corresponds to an energy loss to gravitational waves that is 6.5 +- 4 % less than the rate predicted by the standard quadrupolar gravitational wave (GW) emission. We show that the difference is due to higher order gravitational radiation reaction terms that include the dominant order tail contributions.
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