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arXiv 1002.0005hep-ph
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非弹性暗物质作为致密星的有效燃料

Inelastic Dark Matter As An Efficient Fuel For Compact Stars

Dan Hooper, Douglas Spolyar, Alberto Vallinotto, Nickolay Y. Gnedin

摘要:

暗物质以弱相互作用的大质量粒子的形式被预测会被引力捕获并在恒星中积累。虽然这些粒子随后的湮灭导致能量注入恒星核心,但弹性散射的暗物质粒子通常不会产生足够的能量来显著影响恒星现象。然而,与原子核非弹性散射的暗物质粒子(这样它们就能使DAMA报告的年度调制与CDMS和其他实验的零结果相一致),可以以更高的速率被致密恒星捕获并湮灭。因此,居住在高暗物质密度环境中的老白矮星可以防止冷却到几千开氏度以下。因此,对矮球状星系或银河系内部千秒差距内的古老冷白矮星的观测,可能为非弹性暗物质假说提供有价值的检验。

英文摘要:

Dark matter in the form of weakly interacting massive particles is predicted to become gravitationally captured and accumulate in stars. While the subsequent annihilations of such particles lead to the injection of energy into stellar cores, elastically scattering dark matter particles do not generally yield enough energy to observably impact stellar phenomenology. Dark matter particles which scatter inelastically with nuclei (such that they reconcile the annual modulation reported by DAMA with the null results of CDMS and other experiments), however, can be captured by and annihilate in compact stars at a much higher rate. As a result, old white dwarf stars residing in high dark matter density environments can be prevented from cooling below several thousand degrees Kelvin. Observations of old, cool white dwarfs in dwarf spheroidal galaxies, or in the inner kiloparsec of the Milky Way, can thus potentially provide a valuable test of the inelastic dark matter hypothesis.

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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