期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 765, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/765/1/L21
关键词
asteroseismology; dark matter; stars: individual (alpha Cen B, KIC 8006161, HD 52265)
资金
- FCT-MCTES [SFRH/BD/44321/2008]
- Fundacao Calouste Gulbenkian
- Fundação para a Ciência e a Tecnologia [SFRH/BD/44321/2008] Funding Source: FCT
We report the first constraints on the properties of weakly interacting low-mass dark matter (DM) particles using asteroseismology. The additional energy transport mechanism due to accumulated asymmetric DM particles modifies the central temperature and density of low-mass stars and suppresses the convective core expected in 1.1-1.3 M-circle dot stars even for an environmental DM density as low as the expected in the solar neighborhood. An asteroseismic modeling of the stars KIC 8006161, HD 52265, and a Cen B revealed small frequency separations significantly deviated from the observations, leading to the exclusion of a region of the DM parameter space mass versus spin-dependent DM-proton scattering cross section comparable with present experimental constraints.
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