Equilibrium sequences of non rotating and rapidly rotating crystalline color superconducting hybrid stars
arXiv:0710.3874 · doi:10.1103/PhysRevD.77.023004
Abstract
The three-flavor crystalline color-superconducting (CCS) phase of quantum chromodynamics (QCD) is a candidate phase for the ground state of cold matter at moderate densities above the density of the deconfinement phase transition. Apart from being a superfluid, the CCS phase has properties of a solid, such as a lattice structure and a shear modulus, and hence the ability to sustain multipolar deformations in gravitational equilibrium. We construct equilibrium configurations of hybrid stars composed of nuclear matter at low, and CCS quark matter at high, densities. Phase equilibrium between these phases is possible only for rather stiff equations of state of nuclear matter and large couplings in the effective Nambu--Jona-Lasinio Lagrangian describing the CCS state. We identify a new branch of stable CCS hybrid stars within a broad range of central densities which, depending on the details of the equations of state, either bifurcate from the nuclear sequence of stars when the central density exceeds that of the deconfinement phase transition or form a new family of configurations separated from the purely nuclear sequence by an instability region. The maximum masses of our non-rotating hybrid configurations are consistent with the presently available astronomical bounds. The sequences of hybrid configurations that rotate near the mass-shedding limit are found to be more compact and thus support substantially larger spins than their same mass nuclear counterparts.
8 pages, 7 figures, uses RevTex
References in corpus (15)
- Quark matter in compact stars?
- Upper limits on gravitational wave emission from 78 radio pulsars
- Modern compact star observations and the quark matter equation of state
- Pulsars as Astrophysical Laboratories for Nuclear and Particle Physics
- The Crystallography of Three-Flavor Quark Matter
- Hybrid stars within a covariant, nonlocal chiral quark model
- Testing the Ginzburg-Landau approximation for three-flavor crystalline color superconductivity
- Neutrino emission from compact stars and inhomogeneous color superconductivity
- Multiwavelength Observations of EXO 0748-676 - I. Reprocessing of X-ray Bursts
- Constraining crystalline color superconducting quark matter with gravitational-wave data
- Multiwavelength Observations of EXO 0748--676 -- II. Emission Line Behavior
- The quark core of protoneutron stars in the phase diagram of quark matter
- Gluonic phase versus LOFF phase in two-flavor quark matter
- Larkin-Ovchinnikov-Fulde-Ferrell state in two-color quark matter
- A Neutron Star in F-sharp
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- Three flavor Nambu-Jona Lasinio model with Polyakov loop and competition with nuclear matter
- Stability of CFL cores in Hybrid Stars
- Phase transitions in neutron stars and their links to gravitational waves
- Quark-nuclear hybrid equation of state for neutron stars under modern observational constraints
- Gravitational radiation from crystalline color-superconducting hybrid stars
- Phase diagram of chiral quark matter: Fulde-Ferrell pairing from weak to strong coupling
- Probing hybrid stars with gravitational waves via interfacial modes
- Isovector properties of quark matter and quark stars in an isospin-dependent confining model
- On attributes of a Rotating Neutron star with a Hyperon core
- Stable configurations of hybrid stars with colour-flavour-locked core
- Kaon Condensation, Black Holes and Cosmological Natural Selection
- Phase diagram of chiral quark matter: color and electrically neutral Fulde-Ferrell phase
- Fastest spinning millisecond pulsars: indicators for quark matter in neutron stars?
- Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement