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arXiv 0812.0797astro-ph
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CHAMPs的银河系约束

Galactic constraints on CHAMPs

F. J. Sanchez-Salcedo, E. Martinez-Gomez

摘要:

我们改进了早期的银河系边界,可以放置在带电元素粒子(CHAMP)的暗物质的分数。这些限制对于CHAMP来说是很有意义的,因为CHAMP的质量太大,以至于它们无法通过与普通物质的电磁相互作用看到,而其在银河系磁场中的回旋半径太小,以至于晕CHAMP无法到达地球。如果未中和的CHAMP在该质量范围内很好地混合在晕中,它们最多只能占星系晕质量的<(3-7)x 10^{-3}的一小部分。如果CHAMPs衰变为中性暗物质,它们可能仍然是尖晕问题的解决方案,但需要进行微调。我们还讨论了CHAMP不填充球形晕的情况。

英文摘要:

We improve earlier Galactic bounds that can be placed on the fraction of dark matter in charged elemental particles (CHAMPs). These constraints are of interest for CHAMPs whose mass is too large for them to have seen through their electromagnetic interaction with ordinary matter, and whose gyroradius in the galactic magnetic field is too small for halo CHAMPs to reach Earth. If unneutralized CHAMPs in that mass range are well mixed in the halo, they can at most make up a fraction < (3-7) x 10^{-3} of the mass of the Galactic halo. CHAMPs might still be a solution to the cuspy halo problem if they decay to neutral dark matter but a fine-tuning is required. We also discuss the case where CHAMPs do not populate a spherical halo.

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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