环双星盘中的潮汐破裂。II：混响频谱中的观测特征
Tidal disruptions in circumbinary disks. II: Observational signatures in the reverberation spectra
摘要：
如果两个星系都含有大质量黑洞，那么在星系合并过程中就会形成具有亚pc间距的超大质量双星黑洞。然而，我们仍然无法找到明确的观测证据。我们提出了一种新的方法来识别这些系统的混响映射其circumbinary磁盘后，潮汐中断事件电离it. The潮汐中断的恒星在次级导致强烈的不对称性的磁盘响应。我们模型的形状的速度-延迟映射的各种玩具盘模型和更现实的气体分布SPH模拟获得。用{ \em Cloudy}计算电离盘的发射率。我们发现特殊的不对称性的地图偏离中心的电离源，这可能有助于我们约束的几何参数的circumbinary磁盘，如半长轴和轨道相位的第二，以及帮助加强观测证据sub-parsec SMBBH等。
英文摘要：
Supermassive Binary Black Holes (SMBBHs) with sub-pc separations form in the course of galaxy mergers, if both galaxies harbour massive black holes. Clear observational evidence for them however still eludes us. We propose a novel method of identifying these systems by means of reverberation mapping their circumbinary disk after a tidal disruption event has ionized it. The tidal disruption of a star at the secondary leads to strong asymmetries in the disk response. We model the shape of the velocity--delay maps for various toy disk models and more realistic gas distributions obtained by SPH simulations. The emissivity of the ionized disk is calculated with {\em Cloudy}. We find peculiar asymmetries in the maps for off center ionizing sources that may help us constrain geometrical parameters of a circumbinary disk such as semi-major axis and orbital phase of the secondary, as well as help strengthen the observational evidence for sub-parsec SMBBHs as such.
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