Constraints on asymmetric dark matter from asteroseismology

6th Nuclear Physics in Astrophysics

物理学;天文学

Casanellas, J.^1 ; Lopes, I.^2

Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Germany^1

CENTRA, Instituto Superior Técnico, Universidade de Lisboa, Portugal^2

关键词: Asteroseismology;    Dark matter;    Low-mass stars;    Proton scattering;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012016/pdf
DOI  :  10.1088/1742-6596/665/1/012016

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We report recent results on the impact of asymmetric dark matter (DM) particles on low-mass stars. First, we found that the small convective core expected in stars with masses between 1.1 and 1.3 Mois suppressed due to DM cooling. Moreover, stars with masses below 1 Mohave their central temperatures and densities more strongly influenced by DM than in the solar case. We were able to put limits to the DM mass and spin-dependent DM-proton scattering cross section by comparing the modelling of the nearby star α Cen B with photometric, spectroscopic and asteroseismic observations.