Proto-Strange Quark Star Structure
arXiv:2004.05189 · doi:10.1007/s12648-020-01770-y
Abstract
In this paper, we investigate the newborn strange quark stars with constant entropy. We also use the MIT bag model to calculate the thermodynamic properties in two cases; the density-dependent bag constant and the fixed bag constant (B = 90 MeV). We show that the equation of state becomes stiffer by using the density dependent bag constant and by increasing the entropy. Furthermore, we show that the adiabatic index of the system reaches to 4/3 at high densities. Later, we calculate the structure of a strange quark star using the equation of state and the general relativistic equations of hydrostatic equilibrium, the Tolman-Oppenheimer-Volkoff (TOV) equations. We show that the gravitational mass of the star decreases by increasing the entropy and the maximum gravitational mass is larger when we use the density-dependent bag constant at fixed central energy density. It is shown that the mass-radius relation for this system obeys M R^ 3 for different cases of the calculations. Finally, we show that for a given stellar mass considering the fixed bag constant, the maximum gravitational red shift of a strange quark star occurs at larger values of entropy.
arXiv comment7 pages, 10 figures, Ind J. Phys. (2020) accepted for publication
References in corpus (17)
- EXO 0748-676 Rules out Soft Equations of State for Neutron Star Matter
- Core-collapse supernova explosions triggered by a quark-hadron phase transition during the early post-bounce phase
- Astrophysical Implications of Equation of State for Hadron-Quark Mixed Phase: Compact Stars and Stellar Collapses
- Stability windows for proto-quark stars
- Computation of the structure of magnetized strange quark star
- Impact of Quarks and Pions on Dynamics and Neutrino Signal of Black Hole Formation in Non-rotating Stellar Core Collapse
- The quark core of protoneutron stars in the phase diagram of quark matter
- Bag model and quark star
- Structure of Neutron Star with a Quark Core
- Calculation of the Structure Properties of a Strange Quark Star in the Presence of Strong Magnetic Field Using a Density Dependent Bag Constant
- Observability of Neutron Stars with Quarks
- Maximum Mass of the Hot Neutron Star with the Quark Core
- Finite temperature calculations for the bulk properties of strange star using a many-body approach
- Structure of Quark Stars
- The effect of dynamical quark mass in the calculation of strange quark star structure
- Hot Spin Polarized Strange Quark Stars in the Presence of Magnetic Field using a density dependent bag constant
- Signatures of QCD Phase Transition in a Newborn Compact Star