Instability of the Proca field on Kerr spacetime
Instability of the Proca field on Kerr spacetime
复制标题
克尔时空上普罗卡场的不稳定性
DOI:
10.1103/physrevd.98.104006
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发表时间:
2018
影响因子:
5
通讯作者:
S. Dolan
中科院分区:
文献类型:
--
作者:
S. Dolan
The field of a massive vector boson in the vicinity of a rotating black hole is known to suffer an instability, due to the exponential amplification of (co-rotating, low-frequency) bound state modes by black hole superradiance. Here we calculate the bound state spectrum by exploiting the separation of variables recently achieved by Frolov, Krtou, Kubiz'ak and Santos (FKKS) for the Proca field on Kerr-(A)dS-NUT spacetimes of arbitrary dimension. Restricting to the 4D Kerr case, we first establish the relationship between the FKKS and Teukolsky variables in the massless case; obtain exact results for the angular eigenvalues in the marginally-bound case; and present a spectral method for solving the angular equation in the general case. We then demonstrate that all three physical polarizations can be recovered from the FKKS ansatz, resolving an open question. We present numerical results for the instability growth rate for a selection of modes of all three polarizations, and discuss physical implications.
影响因子:
5
作者:
S. Dolan
通讯作者:
S. Dolan
影响因子:
3.5
作者:
Dolan, Sam R.;Dempsey, David
通讯作者:
Dempsey, David
影响因子:
6.4
作者:
Cardoso V
通讯作者:
Cardoso V