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Title: On the Stability of Strange Dwarf Hybrid Stars

Abstract

We investigate the stability of “strange dwarfs”: white-dwarf-sized stars with a density discontinuity between a small dense core of quark matter and a thick low-density mantle of degenerate electrons. Previous work on strange dwarfs suggested that such a discontinuity could stabilize stars that would have been classified as unstable by the conventional criteria based on extrema in the mass–radius relation. We investigate the stability of such stars by numerically solving the Sturm–Liouville equations for the lowest-energy modes of the star. We find that the conventional criteria are correct, and strange dwarfs are not stable.

Authors:
;  [1];  [2]
  1. Physics Department, Washington University, St. Louis, MO 63130 (United States)
  2. Department of Physics, University of California, Berkeley, CA 94720 (United States)
Publication Date:
OSTI Identifier:
22679803
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 847; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPUTERIZED SIMULATION; DENSITY; DWARF STARS; ELECTRONS; EQUATIONS OF STATE; INSTABILITY; MASS; NEUTRONS; QUARK MATTER; QUARKS; STABILITY; STURM-LIOUVILLE EQUATION; WHITE DWARF STARS

Citation Formats

Alford, Mark G., Harris, Steven P., and Sachdeva, Pratik S., E-mail: harrissp@wustl.edu. On the Stability of Strange Dwarf Hybrid Stars. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA8509.
Alford, Mark G., Harris, Steven P., & Sachdeva, Pratik S., E-mail: harrissp@wustl.edu. On the Stability of Strange Dwarf Hybrid Stars. United States. doi:10.3847/1538-4357/AA8509.
Alford, Mark G., Harris, Steven P., and Sachdeva, Pratik S., E-mail: harrissp@wustl.edu. Sun . "On the Stability of Strange Dwarf Hybrid Stars". United States. doi:10.3847/1538-4357/AA8509.
@article{osti_22679803,
title = {On the Stability of Strange Dwarf Hybrid Stars},
author = {Alford, Mark G. and Harris, Steven P. and Sachdeva, Pratik S., E-mail: harrissp@wustl.edu},
abstractNote = {We investigate the stability of “strange dwarfs”: white-dwarf-sized stars with a density discontinuity between a small dense core of quark matter and a thick low-density mantle of degenerate electrons. Previous work on strange dwarfs suggested that such a discontinuity could stabilize stars that would have been classified as unstable by the conventional criteria based on extrema in the mass–radius relation. We investigate the stability of such stars by numerically solving the Sturm–Liouville equations for the lowest-energy modes of the star. We find that the conventional criteria are correct, and strange dwarfs are not stable.},
doi = {10.3847/1538-4357/AA8509},
journal = {Astrophysical Journal},
number = 2,
volume = 847,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}