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arXiv 0910.4969astro-ph.HE
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双黑洞扰动下盘的并合后电磁辐射

Post-merger electromagnetic emissions from disks perturbed by binary black holes

Matthew Anderson, Luis Lehner, Miguel Megevand, David Neilsen

摘要:

我们模拟了在反冲的超大质量黑洞的扰动下,圆盘可能产生的辐射。为此,我们研究了辐射传输的系统,将韧致辐射发射麦克斯韦等离子体和吸收克雷默的不透明度定律修改,将黑体效应。我们采用这个模型在辐射传输集成计算在几个频率的光度,并与以前的韧致辐射光度估计从透明的限制(其中的发射率是集成在计算域和所有频率),并与一个简单的热发射模型进行比较。我们发现辐射传输的结果和估计韧致辐射亮度从以前的工作高于$10^{14}$ Hz的电磁信号之间的密切协议。对于较低的频率,我们发现在磁盘中的一个self-eclipsing行为,导致在一个强大的强度变化连接到磁盘的轨道周期。

英文摘要:

We simulate the possible emission from a disk perturbed by a recoiling super-massive black hole. To this end, we study radiation transfer from the system incorporating bremsstrahlung emission from a Maxwellian plasma and absorption given by Kramer's opacity law modified to incorporate blackbody effects. We employ this model in the radiation transfer integration to compute the luminosity at several frequencies, and compare with previous bremsstrahlung luminosity estimations from a transparent limit (in which the emissivity is integrated over the computational domain and over all frequencies) and with a simple thermal emission model. We find close agreement between the radiation transfer results and the estimated bremsstrahlung luminosity from previous work for electromagnetic signals above $10^{14}$ Hz. For lower frequencies, we find a self-eclipsing behavior in the disk, resulting in a strong intensity variability connected to the orbital period of the disk.

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