Robustness of third family solutions for hybrid stars against mixed phase effects

Abstract

We investigate the robustness of third family solutions for hybrid compact stars with a quark matter core that correspond to the occurrence of high-mass twin stars against a softening of the phase transition by means of a construction that mimics the effects of pasta structures in the mixed phase. We consider a class of hybrid equations of state that exploits a relativistic mean-field model for the hadronic as well as for the quark matter phase. We present parametrizations that correspond to branches of high-mass twin star pairs with maximum masses between $2.05M_{\odot }$ and $1.48M_{\odot }$ having radius differences between 3.2 km and 1.5 km, respectively. When compared to a Maxwell construction with a fixed value of critical pressure $P_c$ the effect of the mixed phase construction consists in the occurrence of a region of pressures around $P_c$ belonging to the coexistence of hadronic and quark matter phases between the onset pressure at $P_H$ and the end of the transition at $P_Q$. The maximum broadening which would still allow mass twin compact stars is found to be $(P_Q-P_H{)}_{\max }\approx P_c$ for all parametrizations within the present class of models. At least the heavier of the neutron stars of the binary merger GW170817 could have been a member of the third family of hybrid stars.

8 pages, 8 figures, revised version as published in Phys. Rev. D, references updated

References in corpus (11)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
• Neutron-star radius constraints from GW170817 and future detections
• A new quark-hadron hybrid equation of state for astrophysics - I. High-mass twin compact stars
• Disordered nuclear pasta, magnetic field decay, and crust cooling in neutron stars
• Compact stars with sequential QCD phase transitions
• Quark deconfinement transition in hyperonic matter
• Model of the Phase Transition Mimicking the Pasta Phase in Cold and Dense Quark-Hadron Matter
• Mixed Phase within the Multi-polytrope Approach to High Mass Twins

Cited by in corpus (47)

• Gravitational waves from neutron star mergers and their relation to the nuclear equation of state
• Constraining twin stars with GW170817
• Third family of compact stars within a nonlocal chiral quark model equation of state
• Phases of dense matter in compact stars
• Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars
• Extreme Matter meets Extreme Gravity: Ultra-heavy neutron stars with crossovers and first-order phase transitions
• Hybrid equation of state with pasta phases and third family of compact stars
• What do we learn about vector interactions from GW170817?
• Holographic compact stars meet gravitational wave constraints
• Chiral symmetry restoration by parity doubling and the structure of neutron stars
• Constraining strangeness in dense matter with GW170817
• Sexaquark dilemma in neutron stars and its solution by quark deconfinement
• On the nature of the mass-gap object in the GW190814 event
• Modified MIT Bag Models -- part II: QCD phase diagram and hot quark stars
• Towards a Unified Quark-Hadron Matter Equation of State for Applications in Astrophysics and Heavy-Ion Collisions
• 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
• Constraining quark-hadron interface tension in the multi-messenger era
• Two novel approaches to the hadron-quark mixed phase in compact stars
• Parity Doubling and the Dense Matter Phase Diagram under Constraints from Multi-Messenger Astronomy
• Constraint on phase transition with the multimessenger data of neutron stars
• Hybrid stars with sequential phase transitions: the emergence of the g${}_2$ mode
• Hybrid neutron stars in the mass-radius diagram
• Hadron matter in neutron stars in view of gravitational wave observations
• Astrophysical aspects of general relativistic mass twin stars
• Speed of Sound in Hybrid Stars and the Role of Bag Pressure in the Emergence of Special Points on M-R Variation of Hybrid Stars
• Bayesian Analysis for Extracting Properties of the Nuclear Equation of State from Observational Data including Tidal Deformability from GW170817
• Cooling of neutron stars in "nuclear medium cooling scenario" with stiff equation of state including hyperons
• Mixed phase transition from hypernuclear matter to deconfined quark matter fulfilling mass-radius constraints of neutron stars
• Probing hadron-quark phase transition in twin stars using $f$-modes
• A Detailed Analysis of the Special Points on $M-R$ Solutions of Hybrid (Twin) Stars
• Properties of Hybrid Stars with Density Dependent Bag Model
• Structure formation during phase transitions in strongly interacting matter
• A mixing interpolation method to mimic pasta phases in compact star matter
• QCD Phase Diagrams via QHD and MIT-Based Models
• Bayesian Quantification of Observability and Equation of State of Twin Stars
• Observational Probes of the Neutron Star Equation of State with Hyperons, Bosonic Dark Matter, and Quark Matter
• Cosmological Constant Effects on the Properties of Mass Twin Compact Stars
• Interface effects of strange quark matter
• Probing Strange Dark Matter through $f$-mode Oscillations of Neutron Stars with Hyperons and Quark Matter
• Properties of the Object HESS J1731-347 as a Twin Compact Star
• Bayesian analysis of multimessenger M-R data with interpolated hybrid EoS
• Bayesian inference favors quark matter in neutron star interiors
• Electrically charged supermassive twin stars
• A new class of hybrid EoS with multiple critical endpoints for simulations of supernovae, neutron stars and their mergers
• Differentiating between sharp and smoother phase transitions in neutron stars
• Bayesian Constraints on the Neutron Star Equation of State with a Smooth Hadron-Quark Crossover
• Twin stars: probe of phase transition from hadronic to quark matter