克尔黑洞附近的暗物质尖峰
Dark matter spikes in the vicinity of Kerr black holes
摘要：
大质量黑洞的成长将使星系中心的冷暗物质密度变陡，成为一个密集的尖峰，增强了间接探测的前景。在完全相对论性绝热增长框架下，利用黑整体的精确Kerr几何，研究了黑洞自旋对密度分布的影响。我们发现，尽管角动量从洞转移到晕，旋转显着增加黑洞附近的暗物质密度。引力效应仍然由黑洞在其影响半径内主导，但更大的暗物质湮灭通量可能与间接探测估计有关。
英文摘要：
The growth of a massive black hole will steepen the cold dark matter density at the center of a galaxy into a dense spike, enhancing the prospects for indirect detection. We study the impact of black hole spin on the density profile using the exact Kerr geometry of the black whole in a fully relativistic adiabatic growth framework. We find that, despite the transfer of angular momentum from the hole to the halo, rotation increases significantly the dark matter density close to the black hole. The gravitational effects are still dominated by the black hole within its influence radius, but the larger dark matter annihilation fluxes might be relevant for indirect detection estimates.
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