Chromothermal oscillations and collapse of strange stars to black holes: astrophysical implications

Manjari Bagchi, Rachid Ouyed, Jan Staff, Subharthi Ray, Mira Dey, Jishnu Dey

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We study the effects of temperature on strange stars. It is found that the maximum mass of the star decreases with the increase of temperature, as at high temperatures the equations of state become softer. Moreover, if the temperature of a strange star increases, keeping its baryon number fixed, its gravitational mass increases and its radius decreases. This leads to a limiting temperature, where it turns into a black hole. These features are the result of a combined effect of the change of gluon mass and the quark distribution with temperature. We report on a new type of radial oscillation of strange stars, driven by what we call 'chromothermal' instability. We also discuss the relevance of our findings in the astrophysics of core collapse supernovae and gamma-ray bursts.
Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume387
Issue number1
DOIs
Publication statusPublished - 2008
Externally publishedYes

Keywords

  • Black hole physics
  • Dense matter
  • Equation of state
  • Instabilities
  • Stars: neutron
  • Stars: oscillations

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