Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement
arXiv:2512.07977 · doi:10.1016/j.jspc.2026.100286
Abstract
We study rotating hybrid stars, with particular emphasis on the effect of spin on the deconfinement phase transition and star properties. Our analysis is based on a hybrid equation of state with a phase transition from hadronic matter containing hyperons to color-superconducting quark matter, where the quark phase is modeled within a relativistic density functional approach. By varying the strength of the vector repulsion and diquark pairing couplings in the microscopic quark Lagrangian, we construct a set of hybrid star sequences with different quark-matter onset densities. This framework ensures consistency with astrophysical and gravitational wave constraints on mass, radius, and tidal deformability.
Proceedings of XQCD 2025
References in corpus (49)
- A Massive Pulsar in a Compact Relativistic Binary
- PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
- A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
- A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
- Tests of general relativity from timing the double pulsar
- Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
- The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
- PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star
- The Mass and Radius of the Neutron Star in 4U 1820-30
- Signals of the QCD phase transition in core-collapse supernovae
- A NICER View of the Nearest and Brightest Millisecond Pulsar: PSR J0437$\unicode{x2013}$4715
- A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
- Quark matter in compact stars?
- PSR J1810+1744: Companion Darkening and a Precise High Neutron Star Mass
- Optical spectroscopy and demographics of redback millisecond pulsar binaries
- The Spin Distribution of Fast Spinning Neutron Stars in Low Mass X-Ray Binaries: Evidence for Two Sub-Populations
- What is the nature of the HESS J1731-347 compact object?
- Constraints on the dense matter EOS from the measurements of PSR J0737-3039A moment of inertia and PSR J0751+1807 mass
- Equilibrium sequences of non rotating and rapidly rotating crystalline color superconducting hybrid stars
- NICER X-ray Observations of Seven Nearby Rotation-Powered Millisecond Pulsars
- A Massive Millisecond Pulsar in an Eccentric Binary
- A Spectroscopic Study of the Extreme Black Widow PSR J1311-3430
- Phase transitions in rotating neutron stars cores: back bending, stability, corequakes and pulsar timing
- The MPIfR-MeerKAT Galactic Plane survey I -- System setup and early results
- Sexaquark dilemma in neutron stars and its solution by quark deconfinement
- Consequences of a strong phase transition in the dense matter equation of state for the rotational evolution of neutron stars
- Universal relations for rapidly rotating cold and hot hybrid star
- Twin stars as probes of the nuclear equation of state: effects of rotation through the PSR J0952-0607 pulsar and constraints via the tidal deformability from the GW170817 event
- Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries
- Discovery and timing of ten new millisecond pulsars in the globular cluster Terzan 5
- Constraining properties of rapidly rotating neutron stars using data from heavy-ion collisions
- Recovering the conformal limit of color superconducting quark matter within a confining density functional approach
- Hybrid neutron stars in the mass-radius diagram
- Searches for Shapiro delay in seven binary pulsars using the MeerKAT telescope
- Universal relations for the Keplerian sequence of rotating neutron stars
- Millisecond radio pulsars with known masses: parameter values and equation of state models
- The eccentric millisecond pulsar, PSR J09556150 I: Pulse profile analysis, mass measurements and constraints on binary evolution
- Fast Rotating Neutron Stars: Oscillations and Instabilities
- Hybrid star phenomenology from the properties of the special point
- Gravitomagnetic tidal currents in rotating neutron stars
- A Comprehensive Study of Thermonuclear X-ray Bursts from 4U 1820-30 with NICER: Accretion Disk Interactions and a Candidate Burst Oscillation
- Rapidly rotating neutron stars: Universal relations and EOS inference
- PSR~J19105959A: A rare gravitational laboratory for testing white dwarf models
- Mass measurements and 3D orbital geometry of PSR J19336211
- Rotating Hybrid Stars with Color-Flavor-Locked Quark Matter
- Standard cooling of rapidly rotating isolated neutron stars in 2D
- Formation of twin compact stars in low-mass X-ray binaries: Implications on eccentric and isolated millisecond pulsar populations
- Ridges in rotating neutron-star properties due to first order phase transitions
- Fundamental-mode eigenfrequencies of neutral and charged twin neutron stars