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arXiv 1005.0857astro-ph.HEastro-ph.SRhep-ph
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中子星有暗物质核心吗?

Have neutron stars a dark matter core?

Paolo Ciarcelluti, Fredrik Sandin

摘要:

最近对某些中子星的质量和半径的观测结果与对“正常”中子星的典型观测和理论预测相反。我们认为它们不同寻常的性质可以解释为它们内部暗物质核心的特征。这种解释要求暗物质是由某种形式的稳定、长寿或一般非湮灭粒子组成的,它们可以在恒星中积累。在所提出的方案中,所有的质量半径测量都可以用一个核物质状态方程和一个相对大小不同的暗核来解释。这一假设将受到即将到来的观测的挑战,最终可能成为确定暗物质的有用工具。

英文摘要:

Recent observational results for the masses and radii of some neutron stars are in contrast with typical observations and theoretical predictions for "normal" neutron stars. We propose that their unusual properties can be interpreted as the signature of a dark matter core inside them. This interpretation requires that the dark matter is made of some form of stable, long-living or in general non-annihilating particles, that can accumulate in the star. In the proposed scenario all mass-radius measurements can be explained with one nuclear matter equation of state and a dark core of varying relative size. This hypothesis will be challenged by forthcoming observations and could eventually be a useful tool for the determination of dark matter.

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