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Dark-Matter Admixed Neutron Stars · Around

2011

Dark-Matter Admixed Neutron Stars

Leung, S. -C., Chu, M. -C., Lin, L. -M.

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We study the hydrostatic equilibrium configuration of an admixture of degenerate dark matter and normal nuclear matter by using a general relativistic two-fluid formalism.

We consider non- self-annihilating dark matter particles of mass ~ 1 GeV.
The mass-radius relations and moments of inertia of these dark-matter admixed neutron stars are investigated and the stability of these stars is demonstrated by performing a radial perturbation analysis.
We find a new class of compact stars which consists of a small normal matter core with radius of a few km embedded in a ten-kilometer- sized dark matter halo.

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