Bulk scalar emission from a rotating black hole pierced by a tense brane
Bulk scalar emission from a rotating black hole pierced by a tense brane
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DOI：
10.1103/physrevd.77.044022
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发表时间：
2007-11
影响因子：
5
通讯作者：
Tsutomu Kobayashi;Masato Nozawa;Yuichi Takamizu
中科院分区：
文献类型：
--
作者：
Tsutomu Kobayashi;Masato Nozawa;Yuichi Takamizu
研究了被3-膜穿透的6维旋转黑洞标量场向体中的辐射。我们利用连分式方法确定了有限膜张力存在下的角本征值。径向方程的数值积分，给出了吸收概率（灰体因子）在一个更宽的频率范围内比在先前存在的文献。然后，我们计算的功率和角动量发射光谱的不同值的旋转参数和膜张力，并详细比较它们的相对行为。正如先前对非旋转黑洞的结果所预期的那样，有限膜张力抑制了发射率。随着旋转参数的增加，功率谱在低频处由于较小的霍金温度而减小，在高频处由于超辐射而增强。角动量谱在整个频率范围内随转动参数的增加而增强。因此，辐射到物体中的能量和角动量的光谱和数量是由这些效应的相互作用决定的。
We study the emission of scalar fields into the bulk from a six-dimensional rotating black hole pierced by a 3-brane. We determine the angular eigenvalues in the presence of finite brane tension by using the continued fraction method. The radial equation is integrated numerically, giving the absorption probability (graybody factor) in a wider frequency range than in the preexisting literature. We then compute the power and angular momentum emission spectra for different values of the rotation parameter and brane tension, and compare their relative behavior in detail. As is expected from the earlier result for a nonrotating black hole, the finite brane tension suppresses the emission rates. As the rotation parameter increases, the power spectra are reduced at low frequencies due to the smaller Hawking temperature and are enhanced at high frequencies due to superradiance. The angular momentum spectra are enhanced over the whole frequency range as the rotation parameter increases. The spectra and the amounts of energy and angular momentum radiated away into the bulk are thus determined by the interplay of these effects.