Rotational Properties of Inverted Hybrid Stars
arXiv:2407.06410 · doi:10.1103/PhysRevD.111.063026
Abstract
We study the rotational properties of inverted hybrid stars (also termed cross stars), which have been recently proposed as a possible new class of compact stars characterized by an outer layer of quark matter and a core of hadrons, in an inverted structure compared to traditional hybrid stars. We analyze distinct models representing varying depths of quark-hadron phase transitions. Our findings reveal that, while cross stars rotating at their Kepler frequencies typically exhibit a significantly higher mass and larger circumferential radius as anticipated, interestingly, there is a significant increase in potential twin configurations in the case of rapid rotations. We further study sequences of constant baryonic mass, representing potential paths of rotational evolution. Our results indicate that not all stars in these sequences are viable due to the onset of phase transitions during spin-down, leading to possible mini-collapses. We also investigate the phenomenon of ``back-bending" during spin-down sequences, which is manifested in a rather different shape for cross stars due to their inverted structure and the large density discontinuity caused by the strong phase transition, in contrast to traditional hybrid stars. Our research enriches existing studies by introducing the significant aspect of rotation, unveiling intr
arXiv comment8 pages, 9 figures Published in Physical Review D
References in corpus (50)
- The equation of state for nucleon matter and neutron star structure
- Strange Quark Matter and Compact Stars
- Hybrid stars that masquerade as neutron stars
- Evidence for quark-matter cores in massive neutron stars
- Comparing Models of Rapidly Rotating Relativistic Stars Constructed by Two Numerical Methods
- I-Love-Q Relations in Neutron Stars and their Applications to Astrophysics, Gravitational Waves and Fundamental Physics
- I-Love-Q
- Maximum mass, moment of inertia and compactness of relativistic stars
- Implications from GW170817 and I-Love-Q relations for relativistic hybrid stars
- The hadron-quark phase transition in dense matter and neutron stars
- I-Q relation for rapidly rotating neutron stars
- Breakdown of I-Love-Q universality in rapidly rotating relativistic stars
- Quark matter may not be strange
- Phase Transitions in Neutron Stars and Maximum Masses
- Deconfinement phase transition in hybrid neutron stars from the Brueckner theory with three-body forces and a quark model with chiral mass scaling
- Unified Interacting Quark Matter and its Astrophysical Implications
- Influence of the hadronic equation of state on the hadron-quark phase transition in neutron stars
- Hybrid Stars in an SU(3) Parity Doublet Model
- Phase transitions in neutron stars and their links to gravitational waves
- First Order Phase Transitions in Neutron star Matter: Droplets and Coherent Neutrino Scattering
- Maximum mass of compact stars from gravitational wave events with finite-temperature equations of state
- Phase transitions in rotating neutron stars cores: back bending, stability, corequakes and pulsar timing
- Impact of Rotation-Driven Particle Repopulation on the Thermal Evolution of Pulsars
- The role of strangeness in hybrid stars and possible observables
- Maximum mass and universal relations of rotating relativistic hybrid hadron-quark stars
- Modeling Hybrid Stars with an SU(3) non-linear sigma model
- Probing up-down quark matter via gravitational waves
- 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
- Quantum nucleation of up-down quark matter and astrophysical implications
- Interacting and quark matter at finite densities and quark stars
- Thermal Evolution of Neutron Stars in 2 Dimensions
- GW190814: Circumstantial Evidence for Up-Down Quark Star
- Rotating hybrid compact stars
- Spin-down of Relativistic Stars with Phase Transitions and PSR J0537-6910
- Phase Transitions in Neutron Stars
- Hybrid neutron stars in the mass-radius diagram
- Hybrid neutron stars based on a modified PNJL model
- Quark Deconfinement in Rotating Neutron Stars
- Rotating Twin Stars and Signature of Quark-Hadron Phase Transition
- Compactness in the Thermal Evolution of Twin Stars
- Hybrid Strangeon Stars
- Supercritically charged objects and electron-positron pair creation
- Interface effects of quark matter: Light-quark nuggets and compact stars
- Radial and Non-Radial Oscillations of Inverted Hybrid Stars
- Universal relations for anisotropic interacting quark stars
- The study of nonstrange quark stars within a modified NJL model
- Hybrid stars may have an inverted structure
- On the energy budget of starquake-induced repeating fast radio bursts
- Approaching the conformal limit of quark matter with different chemical potentials