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arXiv 0901.1093astro-ph.CO
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原始黑洞再次成为人们关注的焦点

Primordial black holes are again on the limelight

Marco Roncadelli, Aldo Treves, Roberto Turolla

摘要:

我们推导出一个强的上限的数量的原始黑洞(PBH),仍然可以存在于宇宙中。银河系恒星在形成和随后的吸积过程中对PBH的引力捕获将导致盘星,特别是白矮星的急剧消耗,除非PBH的平均宇宙密度和质量受到严格限制。我们的发现也有助于区分PBH的各种生产机制。此外,我们表明,一颗恒星成为overlightning消失前的PBH的时间跨度独立于其质量,从而提供了一个特征的观测签名所考虑的情况。我们强调,我们的结果允许存在恒星质量的黑洞的质量范围内,这是禁止的标准恒星演化。

英文摘要:

We derive a strong upper bound on the amount of Primordial Black Holes (PBHs) that can still be present in the Universe. Gravitational capture of PBHs by the Milky Way stars during their formation and subsequent accretion would produce a dramatic depletion of disk stars and especially of white dwarfs, unless the average cosmic density and mass of PBHs are severely constrained. Our finding also helps to discriminate among the various production mechanisms of PBHs. Moreover, we show that a star becomes overluminous before its disappearance into a PBH for a time span independent of its mass, thereby providing a characteristic observational signature of the considered scenario. We stress that our result allows for the existence of stellar-mass black holes in a mass range that is forbidden by standard stellar evolution.

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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