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arXiv 2008.03291astro-ph.SRastro-ph.HEhep-phnucl-th
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大质量白矮星中的核和暗物质加热

Nuclear and dark matter heating in massive white dwarf stars

C. J. Horowitz

备注：
5 pages, 3 figures
发表信息：
Phys. Rev. D 102, 083031 (2020)
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摘要：

最近，Cheng等人发现了一些大质量白矮星（WD），它们似乎有一个额外的热源，在$\approx 10^{-3}L_\odot$附近提供了多个Gyr的光度。在本文中，我们探讨加热从电子捕获和致密核反应。我们还探讨加热从暗物质湮灭。WD星似乎太小，无法捕获足够的暗物质，因此这很重要。最后，如果暗物质在WD内部凝聚到非常高的密度，这可能会引发核反应。我们计算了一个非常密集的暗物质核心的引力势中WD的增强中心密度。虽然这可能会引发超新星，但似乎不太可能长时间提供适度的加热。我们的结论是，电子捕获，pycnonuclear，和暗物质反应是不可能提供显着的加热在大规模的WD，程认为。

英文摘要：

Recently, Cheng et al. identified a number of massive white dwarfs (WD) that appear to have an additional heat source providing a luminosity near $\approx 10^{-3}L_\odot$ for multiple Gyr. In this paper we explore heating from electron capture and pycnonuclear reactions. We also explore heating from dark matter annihilation. WD stars appear to be too small to capture enough dark matter for this to be important. Finally, if dark matter condenses to very high densities inside a WD this could ignite nuclear reactions. We calculate the enhanced central density of a WD in the gravitational potential of a very dense dark matter core. While this might start a supernova, it seems unlikely to provide modest heating for a long time. We conclude that electron capture, pycnonuclear, and dark matter reactions are unlikely to provide significant heating in the massive WD that Cheng considers.

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