标题： 偏心率对吸积双黑洞的影响：全GR中的MHD模拟揭示了喷流功率和同步辐射光谱中的新周期性 显示英文标题

标题： Effects of eccentricity on accreting binary black holes: MHD simulations in full GR reveal novel periodicities in jet power and synchrotron spectra

摘要： 我们进行了磁流体动力学吸积到等质量、非自旋双黑洞的3+1全广义相对论模拟，研究了轨道偏心率的影响。 我们发现具有不可忽略偏心率的双黑洞以与双黑洞轨道周期相匹配的周期性吸积物质，而准圆轨道双黑洞在大约$\sim 0.7\times$的双黑洞轨道周期处表现出吸积率调制。 此外，我们发现对于偏心双黑洞，总喷流光度在轨道周期上被调制，而准圆轨道双黑洞仅表现出长期调制。 我们对双喷流同步辐射发射进行了辐射转移计算，并证明对于偏心双黑洞，光学薄同步辐射在双黑洞轨道周期上变化。 此外，偏心双黑洞处于{\it 低}状态的时间更长，在此状态下同步辐射发射最小，而在{\it 高}状态下同步辐射发射达到峰值。 准圆轨道双黑洞也表现出其光学薄同步辐射发射的变化，但变化的确切频率似乎对不同参数不稳健。 我们的模拟系列是提供多信使理论模型综合目录的重要一步，这将有助于研究可在电磁波和引力波频谱中检测到的超大质量双黑洞。 显示英文摘要

摘要： We perform simulations of magnetohydrodynamic accretion onto equal-mass, nonspinning binary black holes in 3+1 full general relativity addressing the effects of orbital eccentricity. We find that binary black holes with non-negligible eccentricity accrete matter with periodicity that matches the binary orbital period, whereas quasicircular binaries exhibit accretion rate modulation at approximately $\sim 0.7\times$ their binary orbital period. Additionally, we find that the total jet luminosity is modulated at the orbital period for eccentric binaries, while quasicircular binaries only exhibit long-term modulations. We perform a radiative transfer calculation of the dual jet synchrotron emission and demonstrate that the optically thin synchrotron emission varies on the binary orbital period for eccentric binaries. Moreover, eccentric binaries spend more time in a {\it low} state, where the synchrotron emission is minimum, than in a {\it high} state, where the synchrotron emission peaks. The quasicircular binary also exhibits variability in its optically thin synchrotron emission but the exact frequency of variability does not appear robust against different parameters. Our suite of simulations is an essential step towards providing a comprehensive catalog of multimessenger theoretical models that will enable studies of supermassive binary black holes detectable across the electromagnetic and gravitational wave spectra.