Models Of Strange Stars With A Crust And Strange Dwarfs

Details Models Of Strange Stars With A Crust And Strange Dwarfs Models Of Strange Stars With A Crust And Strange Dwarfs

2004-11-13

arxiv.org/abs/astro-ph/0411370v1

Astrofiz. 47 (2004) 223-236

Astronomy and Astrophysics

Astrophysics

12 pages, 5 figures, 4 tables

Scientific paper

10.1023/B:ASYS.0000031834.95751.

Strange quark stars with a crust and strange dwarfs consisting of a compact strange quark core and an extended crust are investigated in terms of a bag model. The crust, which consists of atomic nuclei and degenerate electrons, has a limiting density of ro_ cr=ro_drip=4.3*10^11g/cm^3. A series of configurations are calculated for two sets of bag model parameters and three different values of ro_cr (10^9g/cm^3<=ro_cr<=ro_drip) to find the dependence of a star's mass M and radius R on the central density. Sequences of stars ranging from compact strange stars to extended strange dwarfs are constructed out of strange quark matter with a crust. The effect of the bag model parameters and limiting crust density ro_cr on the parameters of the strange stars and strange dwarfs is examined. The strange dwarfs are compared with ordinary white dwarfs and observational differences between the two are pointed out.

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