Static structure of general-relativistic degenerate configurations: Effects of a core |
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| Authors: | J L Zhang W Y Chau Kayll Lake J Stone |
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| Institution: | (1) Astrophysics Research Division, China University of Science and Technology, Hefei, Anhwei, People's Republic of China;(2) Astronomy Group, Department of Physics, Queen's University, Kingston, Ontario, Canada |
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| Abstract: | Models of spherically-symmetric static systems made up of self-gravitating, completely degenerate neutral fermions containing a core are constructed within the framework of general relativity and the effects of different core masses and compactness on the properties of the system are examined. For the specific case where the fermions are massive neutrinos ( 10 eV) we find, for example, that it is possible to have a neutrino halo with a normal Galaxy, or a cluster of galaxies, as the core, with the right values of mass and radius required of the  invisible halo in the missing mass problem. The suggestive nature of these results calls for further studies using a more realistic equation of state. |
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