Dark-Matter Admixed Neutron Stars
Abstract
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. These stellar objects may be observed as extraordinarily small neutron stars that are incompatible with realistic nuclear matter models.
Keywords
Cite
@article{arxiv.1111.1787,
title = {Dark-Matter Admixed Neutron Stars},
author = {S. -C. Leung and M. -C. Chu and L. -M. Lin},
journal= {arXiv preprint arXiv:1111.1787},
year = {2011}
}
Comments
5 pages, 5 figures