Constraints on Density Dependent MIT Bag Model Parameters for Quark and Hybrid Stars

Abstract

We compute the equation of state (EoS) of strange quark stars (SQSs) with the MIT Bag model using density dependent bag pressure, characterized by a Gaussian distribution function. The bag pressure's density dependence is controlled by three key parameters namely the asymptotic value ($B_{as}$), $\Delta B(=B_0-B_{as})$, and $\beta$. We explore various parameter combinations ($B_{as}$, $\Delta B$, $\beta$) that adhere to the Bodmer-Witten conjecture, a criterion for the stability of SQSs. Our primary aim is to analyze the effects of these parameter variations on the structural properties of SQSs. However we find that none of the combinations can satisfy the NICER data for PSR J0030+0451 and the constraint on tidal deformability from GW170817. So it can be emphasized that this model cannot describe reasonable SQS configurations. We also extend our work to calculate structural properties of hybrid stars (HSs). With the density dependent bag model (DDBM), these astrophysical constraints are fulfilled by the HSs configurations within a very restricted range of the three parameters. The present work is the first to constrain the parameters of DDBM for both SQS and HSs using the recent astrophysical constraints on tidal deformabiity from GW170817 and that on mass-radius relationship from NICER data.

arXiv commentAccepted for publication in Nuclear Physics A

References in corpus (48)

• GW170817: Measurements of Neutron Star Radii and Equation of State
• 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
• Tidal Love numbers of neutron stars
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Tidal deformability of neutron stars with realistic equations of state and their gravitational wave signatures in binary inspiral
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Quark Matter In Massive Compact Stars
• The hadron-quark phase transition in dense matter and neutron stars
• Nonparametric Inference of Neutron Star Composition, Equation of State, and Maximum Mass with GW170817
• Constraints on interquark interaction parameters with GW170817 in a binary strange star scenario
• Equation of state and thickness of the inner crust of neutron stars
• Signals in the tidal deformability for phase transitions in compact stars with constraints from GW170817
• Maximum mass of neutron stars with a quark core
• Hybrid stars in the light of GW170817
• The Vlasov formalism for extended relativistic mean field models: the crust-core transition and the stellar matter equation of state
• Hybrid stars with the color dielectric and the MIT bag models
• Constraining values of bag constant for strange star candidates
• Equation of state for neutron stars with hyperons and quarks in relativistic Hartree-Fock approximation
• Stability of magnetized strange quark matter in the MIT bag model with the density dependent bag pressure
• Gravitational-wave Signature of a First-order Quantum Chromodynamics Phase Transition in Core-Collapse Supernovae
• Quark deconfinement transition in hyperonic matter
• Bayesian inference of strange star equation of state using the GW170817 and GW190425 data
• Quark matter equation of state and stellar properties
• Maximum mass and universal relations of rotating relativistic hybrid hadron-quark stars
• Thermal evolution of relativistic hyperonic compact stars with calibrated equations of state
• Neutron stars with large quark cores
• 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
• Studying the onset of deconfinement with multi-messenger astronomy of neutron stars
• Bayesian inference of quark star equation of state using the NICER PSR J0030+0451 data
• The special point on the hybrid star mass--radius diagram and its multi--messenger implications
• Strange Stars with a Density-Dependent Bag Parameter
• Special point on the mass radius diagram of hybrid 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
• Non-Newtonian gravity in strange quark stars and constraints from the observations of PSR J0740+6620 and GW170817
• Finding quark content of neutron stars in light of GW170817
• Compact star merger events with stars composed of interacting strange quark matter
• The effect of a density dependent bag constant on the structure of hot neutron star with a quark core
• A Detailed Analysis of the Special Points on $M-R$ Solutions of Hybrid (Twin) Stars
• Gluon effects on the equation of state of color superconducting strange stars
• Properties of Hybrid Stars with Density Dependent Bag Model
• Signatures of quark deconfinement through the r-modes of twin stars
• Cold dense quark matter with phenomenological medium effects: a self-consistent formulation of the quark-mass density-dependent model
• Rotating Hybrid Stars with Color-Flavor-Locked Quark Matter
• Impact of the Nuclear Equation of State on the Stability of Hybrid Neutron Stars
• Proto-Strange Quark Star Structure
• Hot Spin Polarized Strange Quark Stars in the Presence of Magnetic Field using a density dependent bag constant
• Hybrid stars from a three-flavor NJL model with two kinds of tensor condensates

Cited by in corpus (6)

• Is the central compact object in HESS J1731-347 a hybrid star with a quark core? An analysis with the constant speed of sound parametrization
• Analyzing the dense matter equation of states in the light of the compact object HESS J1731-347
• Constraint on the equation of state of strange quark star: Perturbative QCD along with a density-dependent bag constant
• Vetting quark-star models with gravitational waves in the hierarchical Bayesian framework
• The mixed phase quark core in massive hybrid stars
• Effects of Nontrivial Topology on Neutron Star Rotation and its Potential Observational Implications