Constraints on superdense preon stars and their formation scenarios

Details Constraints on superdense preon stars and their formation scenarios Constraints on superdense preon stars and their formation scenarios

2007-02-11

arxiv.org/abs/astro-ph/0702288v1

Astrophys.SpaceSci.307:419-422,2007

Astronomy and Astrophysics

Astrophysics

6 pp. 1 .eps figure, to apear in Astrophys. Space Sci

Scientific paper

10.1007/s10509-007-9392-0

We address in this work the general features of a possible compact stars composed by elementary fermions beyond the quark level. The {\it locus} of these hypothetic objects in the mass-radius plane is constructed for the maximum mass (minimum radius) of the sequence of models in terms of a compositeness scale only, and in fact this approach applies for any composite model postulating fermions at or beyond the preon level. We point out a constraint on the preon mass arising from the applicability of the General Relativity structure equations, leading to the questioning of the hypothesis of light preons if the preon scale is high, provided classical compact objects are enforced. Some remarks on the existence of superdense stars of astrophysical and primordial origin are made and discussed.

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