Rotating hybrid compact stars

Abstract

Starting from equations of state of nucleonic and color-superconducting quark matter and assuming a first-order phase transition between these, we construct an equation of state of stellar matter, which contains three phases: a nucleonic phase, as well as two-flavor and three-flavor color-superconducting phases of quarks. Static sequences of the corresponding hybrid stars include massive members with masses of $\sim 2M_{\odot }$ and radii in the range of $13<R<16$ km. We investigate the integral parameters of rapidly rotating stars and obtain evolutionary sequences that correspond to constant rest-mass stars spinning down by electromagnetic and gravitational radiation. Physically new transitional sequences are revealed that are distinguished by a phase transition from nucleonic to color-superconducting matter for some configurations that are located between the static and Keplerian limits. The snapshots of internal structure of the star, displaying the growth or shrinkage of superconducting volume as the star's spin changes, are displayed for constant rest mass stars. We further obtain evolutionary sequences of rotating supramassive compact stars and construct pre-collapse models that can be used as initial data to simulate a collapse of color-superconducting hybrid stars to a black hole.

9 pages, 9 figures; v2: minor improvements, matches published version, v3: corrected figure placement

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Cited by in corpus (23)

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• Constraining strangeness in dense matter with GW170817
• Rotating neutron stars with exotic cores: masses, radii, stability
• Maximum mass and universal relations of rotating relativistic hybrid hadron-quark stars
• Effects of the quark-hadron phase transition on highly magnetized neutron stars
• Universal relations for rapidly rotating cold and hot hybrid star
• Angular Momentum in QGP Holography
• Astrophysical aspects of general relativistic mass twin stars
• The fate of twin stars on the unstable branch: implications for the formation of twin stars
• Cooling compact stars and phase transitions in dense QCD
• Rotating hybrid stars with the Dyson-Schwinger quark model
• Rotating Hybrid Stars with Color-Flavor-Locked Quark Matter
• Exploring pathways to forming twin stars
• Exploring phases of dense QCD with compact stars
• Rotating Neutron Stars with the Relativistic Ab Initio Calculations
• I-C-Q relations for rapidly rotating stable hybrid stars
• Fastest spinning millisecond pulsars: indicators for quark matter in neutron stars?
• Rotational Properties of Inverted Hybrid Stars
• Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement
• Equation-of-State Independent Relations in Rapidly Rotating Hybrid Stars