Gravitation and Cosmology

, Volume 15, Issue 2, pp 188–190 | Cite as

Stability and observational properties of strange dwarfs

  • Yu. L. VartanyanEmail author
  • G. S. Hajyan
  • A. K. Grigoryan
  • T. P. Sarkisyan


We study the stability of strange dwarfs, i.e., superdense stars with small quark cores (M core/M < 0.017) and extended crusts consisting of atomic nuclei and degenerate electron gas, where the density can be greater by two orders of magnitude than the maximum density of white dwarfs. The mass, total number of baryons and radii of such configurations are unambiguously determined by the central energy density ρ c and the crust energy density ρ tr over the surface of the quark core. Using a static criterion, we define the state of stability loss for strange dwarfs in the whole range of ρ c and ρ tr. It has been shown that the gravitational redshifts of white and strange dwarfs are significantly distinguishable in the ranges of small and large (limiting) masses.

PACS numbers

97.20.Rp 24.85+p 97.10 Nf 97.60.Jd 


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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • Yu. L. Vartanyan
    • 1
    Email author
  • G. S. Hajyan
    • 1
  • A. K. Grigoryan
    • 1
  • T. P. Sarkisyan
    • 1
  1. 1.Department of Wave Processes TheoryYerevan State UniversityYerevanArmenia

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