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arXiv 2403.04054gr-qcastro-ph.CO
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来自霍金蒸发的极端克尔黑洞暗物质

Extremal Kerr Black Hole Dark Matter from Hawking Evaporation

Quinn Taylor, Glenn D. Starkman, Michael Hinczewski, Deyan P. Mihaylov, Joseph Silk, Jose de Freitas Pacheco

AI总结:

本研究发现霍金蒸发的随机过程可使相当比例原初黑洞演化为稳定的1到几个普朗克质量的极端克尔黑洞,这类黑洞吸收粒子概率低,可作为冷暗物质且能构成全部暗物质。

摘要:

霍金过程会导致黑洞质量单调下降,但会使黑洞角动量发生有偏随机游走。我们证明,这一随机过程会导致相当比例的原初黑洞演化为质量为1到几个普朗克质量的极端克尔黑洞(EKBHs),且与其初始质量无关。对于这些EKBHs,即使在星系核心区域,它们从宇宙环境中吸收光子或其他粒子的概率也很低。假设EKBHs是稳定的,它们的表现就如同冷暗物质,并且如果它们形成时具有合适的初始丰度,就可以构成全部的暗物质。

英文摘要:

The Hawking process results in a monotonic decrease of the black hole mass, but a biased random walk of the black hole angular momentum. We demonstrate that this stochastic process leads to a significant fraction of primordial black holes becoming extremal Kerr black holes (EKBHs) of one to a few Planck masses regardless of their initial mass. For these EKBHs, the probability of ever absorbing a photon or other particle from the cosmic environment is small, even in the cores of galaxies. Assuming that EKBHs are stable, they behave as cold dark matter, and can comprise all of the dark matter if they are formed with the correct initial abundance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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