On Low-Mass, Strange Quark Stars with a Crust

Details On Low-Mass, Strange Quark Stars with a Crust On Low-Mass, Strange Quark Stars with a Crust

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap.....44..382v&link_type=abstract

Astrophysics (English translation of Astrofizika), v. 44, Issue 3, p. 382-386 (2001).

Astronomy and Astrophysics

Astrophysics

Scientific paper

Low-mass strange stars with a crust are investigated within the framework of the bag model. The crust, which consists of degenerate electrons and atomic nuclei, has a limiting boundary density cr , which is determined by the mass of the crust, and it cannot exceed the value drip = 4.3·1011 g/cm3, corresponding to the density at which neutrons drip from nuclei. For different values of cr in the low-mass range (M ≤ 0.1 M&sun;) we calculate several series of configurations: we find the dependence of the stellar mass M on the central density ρ c for ρ cr = const, with 109 g/cm3 ≤ ρ cr ≤ ρ drip , and for each series we determine the parameters of the configuration for which the condition dM/dρ c > 0 is violated. When the boundary density of the crust decreases to 109 g/cm3, the minimum mass of a strange star decreases to M min ≈ 10-3 M&sun;, while the radius reaches 600 km.

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