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arXiv 0905.4736astro-ph.HE
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中等质量黑洞周围的暗物质湮灭:最新进展

Dark Matter Annihilation around Intermediate Mass Black Holes: an update

Gianfranco Bertone, Mattia Fornasa, Marco Taoso, Andrew R. Zentner

摘要:

黑洞的形成和演化不可避免地影响到黑洞附近暗物质和重子物质的分布。这些效应可能在超大质量和中等质量黑洞(IMBH)周围特别相关,IMBH的形成可以导致大的暗物质超密度,分别称为{\em spikes}和{\em mini-spikes}。尽管尖峰更大、更密集,但它是在星系晕的中心演化出来的,在那里,许多动力学效应往往会破坏它们。微型尖峰可能更有可能存活下来,它们已被提议作为间接暗物质搜索的有价值的目标。我们在这里审查的形成方案和检测的微型尖峰的前景,我们提出了新的估计的丰度的微型尖峰,以说明这种预测的宇宙学参数和天体物理学的不确定性的黑洞形成在高红移的敏感性。我们还将IMBHs方案与PAMELA,ATIC,H.E.S.S.,费米合作。

英文摘要:

The formation and evolution of Black Holes inevitably affects the distribution of dark and baryonic matter in the neighborhood of the Black Hole. These effects may be particularly relevant around Supermassive and Intermediate Mass Black Holes (IMBHs), the formation of which can lead to large Dark Matter overdensities, called {\em spikes} and {\em mini-spikes} respectively. Despite being larger and more dense, spikes evolve at the very centers of galactic halos, in regions where numerous dynamical effects tend to destroy them. Mini-spikes may be more likely to survive, and they have been proposed as worthwhile targets for indirect Dark Matter searches. We review here the formation scenarios and the prospects for detection of mini-spikes, and we present new estimates for the abundances of mini-spikes to illustrate the sensitivity of such predictions to cosmological parameters and uncertainties regarding the astrophysics of Black Hole formation at high redshift. We also connect the IMBHs scenario to the recent measurements of cosmic-ray electron and positron spectra by the PAMELA, ATIC, H.E.S.S., and Fermi collaborations.

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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