1212.2985 (Jordi Casanellas et al.)

First asteroseismic limits on the nature of dark matter    [PDF]

Jordi Casanellas, Ilídio Lopes

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 Ms stars even for an environmental DM density as low as the expected in the solar neighbourhood. An asteroseismic modelling of the stars KIC 8006161, HD 52265 and Alpha Cen B revealed small frequency separations significantly deviated from the observations, leading to the exclusion of a region of the DM parameter space mass vs. spin-dependent DM-proton scattering cross section comparable with present experimental constraints.

View original: http://arxiv.org/abs/1212.2985