Strange matter in rotating compact stars

Abstract

We have constructed equations of state involving various exotic forms of matter with large strangeness fraction such as hyperon matter, Bose-Einstein condensates of antikaons and strange quark matter. First order phase transitions from hadronic to antikaon condensed and quark matter are considered here. The hadronic phase is described by the relativistic field theoretical model. Later those equations of state are exploited to investigate models of uniformly rotating compact stars. The effect of rotation on the third family branch for the equation of state involving only antikaon condensates is investigated. We also discuss the back bending phenomenon due to a first order phase transition from $K^{-}$ condensed to quark matter.

8 pages, 4 figures; Plenary talk delivered at Strangeness in Quark Matter (SQM) 2004 held in Cape Town, South Africa from 15-20 September; Accepted for publication in the proceedings in Journal of Physics G

References in corpus (16)

• Comparing Models of Rapidly Rotating Relativistic Stars Constructed by Two Numerical Methods
• Hyperon-rich Matter in Neutron Stars
• Gravitationally redshifted absorption lines in the X-ray burst spectra of a neutron star
• Quark phases in neutron stars and a "third family" of compact stars as a signature for phase transitions
• Is RX J185635-375 a Quark Star?
• Kaon Condensation and Dynamical Nucleons in Neutron Stars
• A Revised Parallax and its Implications for RX J185635-3754
• Pulsars as Astrophysical Laboratories for Nuclear and Particle Physics
• Phase Transition to Hyperon Matter in Neutron Stars
• $K^{-}$ - nucleus relativistic mean field potentials consistent with kaonic atoms
• A third family of super dense stars in the presence of antikaon condensates
• SupraNova Events from Spun-up Neutron Stars: an Explosion in Search of an Observation
• Antikaon condensation and the metastability of protoneutron stars
• Color superconducting quark matter core in the third family of compact stars
• Rotating compact stars with exotic matter
• Hyperon softening of the EOS of dense matter and the spin evolution of isolated neutron stars

Cited by in corpus (4)

• Classifications of Twin Star Solutions for a Constant Speed of Sound Parameterized Equation of State
• Stable hybrid stars within a SU(3) Quark-Meson-Model
• Equations of state and stability of color-superconducting quark matter cores in hybrid stars
• Stable configurations of hybrid stars with colour-flavour-locked core