期刊
PHYSICAL REVIEW D
卷 100, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.100.043020
关键词
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资金
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Economic Development Innovation
- Natural Sciences and Engineering Research Council of Canada
- NSF [PHY-1066293]
It was recently demonstrated that asymmetric dark matter can ignite supernovae by collecting and collapsing inside lone sub-Chandrasekhar mass white dwarfs, and that this may be the cause of Type Ia supernovae. A ball of asymmetric dark matter accumulated inside a white dwarf and collapsing under its own weight sheds enough gravitational potential energy through scattering with nuclei to spark the fusion reactions that precede a Type Ia supernova explosion. In this article we elaborate on this mechanism and use it to place new bounds on interactions between nucleons and asymmetric dark matter for masses m(x) = 10(6)-10(16) GeV. Interestingly, we find that for dark matter more massive than 10(11) GeV, Type Ia supernova ignition can proceed through the Hawking evaporation of a small black hole formed by the collapsed dark matter. We also identify how a cold white dwarf's Coulomb crystal structure substantially suppresses dark matter-nuclear scattering at low momentum transfers, which is crucial for calculating the time it takes dark matter to form a black hole. Higgs and vector portal dark matter models that ignite Type Ia supernovae are explored.
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