skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: On the Stability of Strange Dwarf Hybrid Stars

Abstract

We report on 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 research on strange dwarfs indicated 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:
ORCiD logo [1]; ORCiD logo [1];  [2]
  1. Washington Univ., St. Louis, MO (United States)
  2. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Washington Univ., St. Louis, MO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1511028
Grant/Contract Number:  
FG02-05ER41375
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 847; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY

Citation Formats

Alford, Mark G., Harris, Steven P., and Sachdeva, Pratik S. 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. 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. Wed . "On the Stability of Strange Dwarf Hybrid Stars". United States. doi:10.3847/1538-4357/aa8509. https://www.osti.gov/servlets/purl/1511028.
@article{osti_1511028,
title = {On the Stability of Strange Dwarf Hybrid Stars},
author = {Alford, Mark G. and Harris, Steven P. and Sachdeva, Pratik S.},
abstractNote = {We report on 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 research on strange dwarfs indicated 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 = {The Astrophysical Journal (Online)},
number = 2,
volume = 847,
place = {United States},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: Typical mass–radius curve of solutions to the TOV equation for zerotemperature material (Hartle 2003). Stable configurations are shown by solid lines; unstable configurations by dashed lines. At the lowest central pressure the solutions are planet-like, with M ∝ R3. As indicated by the arrows, the central pressure risesmore » as the curve goes through five extrema, which are labeled a to e.« less

Save / Share:

Works referenced in this record:

Generic conditions for stable hybrid stars
journal, October 2013


Strangelet dwarfs
journal, May 2012

  • Alford, Mark G.; Han, Sophia; Reddy, Sanjay
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 39, Issue 6
  • DOI: 10.1088/0954-3899/39/6/065201

Stability of strange star crusts and strangelets
journal, June 2006


A Catalogue of Methods for Studying the Normal Modes of Radial Pulsation of General-Relativistic Stellar Models
journal, August 1966

  • Bardeen, James M.; Thorne, Kip S.; Meltzer, David W.
  • The Astrophysical Journal, Vol. 145
  • DOI: 10.1086/148791

The Ground State of Matter at High Densities: Equation of State and Stellar Models
journal, November 1971

  • Baym, Gordon; Pethick, Christopher; Sutherland, Peter
  • The Astrophysical Journal, Vol. 170
  • DOI: 10.1086/151216

Collapsed Nuclei
journal, September 1971


Phase transitions in dense matter and the maximum mass of neutron stars
journal, April 2013


The Dynamical Instability of Gaseous Masses Approaching the Schwarzschild Limit in General Relativity.
journal, August 1964

  • Chandrasekhar, S.
  • The Astrophysical Journal, Vol. 140
  • DOI: 10.1086/147938

Strange matter
journal, December 1984


Possible New Class of Dense White Dwarfs
journal, May 1995


From Strange Stars to Strange Dwarfs
journal, September 1995

  • Glendenning, N. K.; Kettner, Ch.; Weber, F.
  • The Astrophysical Journal, Vol. 450
  • DOI: 10.1086/176136

Nuclear solid crust on rotating strange quark stars
journal, November 1992

  • Glendenning, N. K.; Weber, F.
  • The Astrophysical Journal, Vol. 400
  • DOI: 10.1086/172026

On Massive Neutron Cores
journal, February 1939


Radial Stability in Stratified Stars
journal, February 2015


Quark phases in neutron stars and a third family of compact stars as signature for phase transitions
journal, September 2000


Static Solutions of Einstein's Field Equations for Spheres of Fluid
journal, February 1939


Cosmic separation of phases
journal, July 1984


Maximum mass of neutron stars and strange neutron-star cores
journal, February 2013


    Works referencing / citing this record:

    Effects of Hadron-Quark Phase Transitions in Hybrid Stars within the NJL Model
    journal, March 2019

    • Ranea-Sandoval, Ignacio; Orsaria, Milva; Malfatti, Germán
    • Symmetry, Vol. 11, Issue 3
    • DOI: 10.3390/sym11030425

      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.