Anisotropic star in Vaidya-Tikekar model admitting MIT bag model equation of state in pseudo-spheroidal geometry

The properties of rotating quark star are studied using the equation of state obtained from chiral colour dielectric model. The results are compared with those obtained from MIT bag model equation of state. The frequencies in the corotating innermost circular orbits for different central densities are evaluated and compared with the observed data.

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Anisotropic EGB hypersphere with MIT bag model equation of state

The European Physical Journal Plus ◽

10.1140/epjp/s13360-021-02132-1 ◽

2021 ◽

Vol 136 (11) ◽

Author(s):

Daniel Krupanandan ◽

Sudan Hansraj

Keyword(s):

Equation Of State ◽

Model Equation ◽

Bag Model ◽

Mit Bag Model

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Entropy development in ideal relativistic fluid dynamics with the Bag Model equation of state

Physics Letters B ◽

10.1016/j.physletb.2010.07.049 ◽

2010 ◽

Vol 692 (4) ◽

pp. 277-280 ◽

Cited By ~ 9

Author(s):

Sz. Horvát ◽

V.K. Magas ◽

D.D. Strottman ◽

L.P. Csernai

Keyword(s):

Fluid Dynamics ◽

Equation Of State ◽

Model Equation ◽

Bag Model ◽

Relativistic Fluid Dynamics ◽

Relativistic Fluid

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QUARK–DIQUARK MATTER EQUATION OF STATE AND COMPACT STAR STRUCTURE

International Journal of Modern Physics D ◽

10.1142/s0218271803002755 ◽

2003 ◽

Vol 12 (03) ◽

pp. 495-507 ◽

Cited By ~ 19

Author(s):

G. LUGONES ◽

J. E. HORVATH

Keyword(s):

Equation Of State ◽

Neutron Stars ◽

Observational Data ◽

Parameter Space ◽

Quark Mass ◽

Mass Density ◽

Compact Star ◽

Bag Model ◽

Mit Bag Model ◽

Dependent Model

We present the equation of state (EOS) of quark-diquark matter in the quark mass-density-dependent model. The region of the 2-D parameter space inside which this quark-diquark matter is stable against diquark disassembling and hadronization is determined. Motivated by observational data suggesting a high compactness of some neutron stars (NS) we present models based on the present EOS and compare the results with those obtained with previous works addressing a quark-diquark composition based on the MIT Bag model. We show that very compact self-bound stars (yet having ≥ 1M⊙) are allowed by our EOS even if the diquark itself is unbound.

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THE PROPERTIES OF STRANGE STARS IN THE QUARK MASS– DENSITY–DEPENDENT MODEL

International Journal of Modern Physics D ◽

10.1142/s0218271898000048 ◽

1998 ◽

Vol 07 (01) ◽

pp. 29-48 ◽

Cited By ~ 15

Author(s):

O. G. BENVENUTO ◽

G. LUGONES

Keyword(s):

Equation Of State ◽

Quark Mass ◽

Mass Density ◽

Baryon Number ◽

Moment Of Inertia ◽

Bag Model ◽

Strange Stars ◽

Strange Matter ◽

Mit Bag Model ◽

Dependent Model

We study the general properties of compact objects made up of strange matter in the framework of a new equation of state in which the quark masses are parametrized as functions of the baryon density, so that they are heavy (light) at low (high) densities. This has been called the "quark mass-density-dependent model." In this approximation, the strange matter equation of state is rather similar to the corresponding to the MIT Bag Model, but it is significantly stiffer at low densities. Such a property modifies the structure of strange stars in a sizeable way. In this framework, we calculate the structure of strange stars (mass, radius, central density, gravitational redshift, moment of inertia, and total baryon number) finding that the resulting structures are rather similar to those obtained in the MIT Bag model, although some important differences appear. Comparing to the standard bagged case (with a bag constant in the range of B = 60 - 80 MeV fm-3), we find that these objects may be more massive and may show gravitational redshifts larger (up to ≈ 10%) than in the bag case. The moment of inertia and total baryon number may be larger than in the bagged case up to a factor of three. We also calculate the first three radial pulsation modes of these objects, finding that the relation of period vs. gravitational redshift is rather similar to the bag case. Also, we present an analytical treatment for such modes in the low-mass strange stars regime, which is in reasonable agreement with the numerical results.

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STRUCTURE OF NEUTRON STAR WITH A QUARK CORE

International Journal of Modern Physics A ◽

10.1142/s0217751x06033854 ◽

2006 ◽

Vol 21 (28n29) ◽

pp. 5991-6001 ◽

Cited By ~ 19

Author(s):

G. H. BORDBAR ◽

M. BIGDELI ◽

T. YAZDIZADEH

Keyword(s):

Neutron Star ◽

Equation Of State ◽

Quark Matter ◽

Bag Model ◽

Quark Core ◽

Mit Bag Model ◽

Bag Constant

The equation of state of deconfined quark matter within the MIT bag model is calculated. This equation of state is used to compute the structure of a neutron star with quark core. It is found that the limiting mass of the neutron star is affected considerably by this modification of the equation of state. Calculations are carried out for different choices of the bag constant.

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MODIFIED BAG MODELS FOR THE QUARK–GLUON PLASMA EQUATION OF STATE

International Journal of Modern Physics E ◽

10.1142/s0218301311019623 ◽

2011 ◽

Vol 20 (08) ◽

pp. 1805-1815 ◽

Cited By ~ 11

Author(s):

V. V. BEGUN ◽

M. I. GORENSTEIN ◽

O. A. MOGILEVSKY

Keyword(s):

Equation Of State ◽

Lattice Qcd ◽

High Temperatures ◽

Quark Gluon Plasma ◽

Model Equation ◽

Gluon Plasma ◽

Quantitative Comparison ◽

Bag Model ◽

Plasma Equation ◽

Bag Constant

The modified versions of the bag model equation of state (EoS) are considered. They are constructed to satisfy the main qualitative features observed for the quark–gluon plasma EoS in the lattice QCD calculations. A quantitative comparison with the lattice results at high temperatures T are done in the SU(3) gluodynamics and in the full QCD with dynamical quarks. Our analysis advocates a negative value of the bag constant B.

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