Perturbed disks get shocked. Binary black hole merger effects on accretion disks
Perturbed disks get shocked. Binary black hole merger effects on accretion disks
复制标题
受到扰动的磁盘会受到震动。
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
D. Neilsen
中科院分区：
文献类型：
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作者：
Miguel Megevand;Matthew Anderson;J. Frank;E. Hirschmann;L. Lehner;S. Liebling;P. Motl;D. Neilsen
双黑洞系统的合并过程会对环双星盘产生强烈的影响。在目前的工作中，我们研究了中心质量减少（由于通过引力波的能量损失）和可能的黑洞反冲（由于引力辐射的不对称发射）的影响。对于质量减少的情况下，反冲指向沿着磁盘的角动量，在磁盘中诱导的振荡，然后调制的内部能量和韧致辐射光度。另一方面，当反冲方向有一个垂直于圆盘角动量的分量时，圆盘的动力学受到强烈的影响，产生相对论性冲击。激波加热在我们的辐射、总内能和韧致辐射光度的替代物中留下了它的特征。有趣的是，对于反冲速度低于盘中最小轨道速度的情况（在真实的活动星系核中可能出现的情况），我们观察到盘的内部能量的共同特征模式。井涌速度的变化仅仅提供了特征模式中的相位偏移，这意味着对这种特征的观测可以仅通过电磁信号产生井涌速度的测量。
The merger process of a binary black hole system can have a strong impact on a circumbinary disk. In the present work we study the effect of both central mass reduction (due to the energy loss through gravitational waves) and a possible black hole recoil (due to asymmetric emission of gravitational radiation). For the mass reduction case and recoil directed along the disk's angular momentum, oscillations are induced in the disk which then modulate the internal energy and bremsstrahlung luminosities. On the other hand, when the recoil direction has a component orthogonal to the disk's angular momentum, the disk's dynamics are strongly impacted, giving rise to relativistic shocks. The shock heating leaves its signature in our proxies for radiation, the total internal energy and bremsstrahlung luminosity. Interestingly, for cases where the kick velocity is below the smallest orbital velocity in the disk (a likely scenario in real active galactic nuclei), we observe a common, characteristic pattern in the internal energy of the disk. Variations in kick velocity simply provide a phase offset in the characteristic pattern implying that observations of such a signature could yield a measure of the kick velocity through electromagnetic signals alone.
影响因子：
8.6
作者：
José A. González;U. Sperhake;B. Brügmann;M. Hannam;S. Husa
通讯作者：
José A. González;U. Sperhake;B. Brügmann;M. Hannam;S. Husa