NDLI: Stability of strange dwarfs. I. Static criterion for stability. Statement of the problem

Content Provider	Springer Nature Link
Author	Vartanyan, Yu. L. Hajyan, G. S. Grigoryan, A. K. Sarkisyan, T. R.
Copyright Year	2009
Abstract	This is a study of the stability of strange dwarfs, superdense stars with a small quark core (M 0core /M ⨀ < 0.017) and an extended crust consisting of atomic nuclei and a degenerate electron gas where the density may be two orders of magnitude greater than the maximum density for white dwarfs. For a given equation of state, the mass, total number of baryons, and radius of strange dwarfs are uniquely determined by the central energy density ρ c and the energy density ρ tr of the crust at the surface of the quark core. Thus, the entire range of variation of ρ c and ρ tr must be taken into account in studying the stability of these configurations. This can be done by examining a series of configurations with a fixed rest mass M 0 (total baryon number) of the quark core and different masses of the crust. In each series, ρ tr ranges from the value for white dwarfs to ρ drip = 4.3∙1011 g/cm3, at which free neutrons are created in the crust. According to the static criterion for stability, stability is lost in an individual series when the mass of the strange dwarf reaches a maximum as a function of ρ tr .
Starting Page	300
Ending Page	306
Page Count	7
File Format	PDF
ISSN	05717256
Journal	Astrophysics
Volume Number	52
Issue Number	2
e-ISSN	15738191
Language	English
Publisher	Springer US
Publisher Date	2009-06-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	strange stars strange dwarfs stability Astronomy Extraterrestrial Physics, Space Sciences Astrophysics Astronomy, Astrophysics and Cosmology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics

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