scholarly journals Stability of magnetized strange quark matter in the MIT bag model with a density dependent bag pressure

2015 ◽  
Vol 91 (1) ◽  
Author(s):  
A. A. Isayev
Keyword(s):  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Bag Model ◽  
Density Dependent ◽  
Mit Bag Model

scholarly journals Magnetized strange quark matter in a mass-density-dependent model

2015 ◽  
Vol 39 (1) ◽  
pp. 015101 ◽  
Author(s):  
Jia-Xun Hou ◽  
Guang-Xiong Peng ◽  
Cheng-Jun Xia ◽  
Jian-Feng Xu
Keyword(s):  
Quark Matter ◽  
Strange Quark ◽  
Mass Density ◽  
Strange Quark Matter ◽  
Density Dependent ◽  
Dependent Model

scholarly journals Interface effects of strange quark matter with density dependent quark masses

2018 ◽  
Vol 98 (3) ◽  
Author(s):  
Cheng-Jun Xia ◽  
Guang-Xiong Peng ◽  
Ting-Ting Sun ◽  
Wan-Lei Guo ◽  
Ding-Hui Lu ◽  
...  
Keyword(s):  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Density Dependent ◽  
Quark Masses ◽  
Interface Effects

Self-consistently thermodynamic treatment for strange quark matter in the effective mass bag model

2008 ◽  
Vol 38 (3) ◽  
pp. 287-293 ◽  
Author(s):  
Tmurbagan Bao ◽  
Guang-Zhou Liu ◽  
En-Guang Zhao ◽  
Ming-Feng Zhu
Keyword(s):  
Effective Mass ◽  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Bag Model

scholarly journals Bulk viscosity of strange quark matter in density dependent quark mass model

Pramana ◽  
2000 ◽  
Vol 54 (5) ◽  
pp. 737-749 ◽  
Author(s):  
J D Anand ◽  
N Chandrika Devi ◽  
V K Gupta ◽  
S Singh
Keyword(s):  
Bulk Viscosity ◽  
Quark Matter ◽  
Quark Mass ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Mass Model ◽  
Density Dependent

scholarly journals MASS–RADIUS RELATION FOR MAGNETIZED STRANGE QUARKS STARS

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1511-1519 ◽  
Author(s):  
A. P. MARTÍNEZ ◽  
R. G. FELIPE ◽  
D. M. PARET
Keyword(s):  
Magnetic Field ◽  
Quark Matter ◽  
Strange Quark ◽  
Baryon Density ◽  
Strange Quark Matter ◽  
Strange Quarks ◽  
Quark Stars ◽  
Mit Bag Model ◽  
The Stability ◽  
The Magnetic Field

We review the stability of magnetized strange quark matter (MSQM) within the phenomenological MIT bag model, taking into account the variation of the relevant input parameters, namely, the strange quark mass, baryon density, magnetic field and bag parameter. A comparison with magnetized asymmetric quark matter in β-equilibrium as well as with strange quark matter (SQM) is presented. We obtain that the energy per baryon for MSQM decreases as the magnetic field increases, and its minimum value at vanishing pressure is lower than the value found for SQM, which implies that MSQM is more stable than non-magnetized SQM. The mass–radius relation for magnetized strange quark stars is also obtained in this framework.

scholarly journals QUARK STARS AND QUANTUM-MAGNETICALLY INDUCED COLLAPSE

2005 ◽  
Vol 14 (11) ◽  
pp. 1959-1969 ◽  
Author(s):  
A. PÉREZ MARTÍNEZ ◽  
H. PÉREZ ROJAS ◽  
H. J. MOSQUERA CUESTA ◽  
M. BOLIGAN ◽  
M. G. ORSARIA
Keyword(s):  
Neutron Stars ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Quark Matter ◽  
Strange Quark ◽  
Vacuum Energy Density ◽  
Bag Model ◽  
X Ray ◽  
Quark Stars ◽  
Mit Bag Model

Quark matter is expected to exist in the interior of compact stellar objects as neutron stars or even the more exotic strange stars, based on the Bodmer–Witten conjecture. Bare strange quark stars and (normal) strange quark-matter stars, those possessing a baryon (electron-supported) crust, are hypothesized as good candidates to explain the properties of a set of peculiar stellar sources such as the enigmatic X-ray source RX J1856.5-3754, some pulsars such as PSR B1828-11 and PSR B1642-03, and the anomalous X-ray pulsars and soft γ-ray repeaters. In the MIT bag model, quarks are treated as a degenerate Fermi gas confined to a region of space having a vacuum energy density B bag (the Bag constant). In this note, we modify the MIT bag model by including the electromagnetic interaction. We also show that this version of the MIT model implies the anisotropy of the bag pressure due to the presence of the magnetic field. The equations of state of the degenerate quarks gases are studied in the presence of ultra strong magnetic fields. The behavior of a system made up of quarks having (or not) anomalous magnetic moment is reviewed. A structural instability is found, which is related to the anisotropic nature of the pressures in this highly magnetized matter. The conditions for the collapse of this system are obtained and compared to a previous model of neutron stars that is built on a neutron gas having anomalous magnetic moment.

MAGNETIC FIELD AND TEMPERATURE EFFECTS ON STRANGELETS

2011 ◽  
Vol 20 (supp02) ◽  
pp. 42-49
Author(s):  
ERNESTO LÓPEZ FUNE ◽  
AURORA PÉREZ MARTÍNEZ ◽  
DARYEL MANREZA PARET ◽  
RICARDO GONZÁLEZ FELIPE
Keyword(s):  
Magnetic Field ◽  
Electric Charge ◽  
Quark Matter ◽  
Temperature Effects ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Mit Bag Model ◽  
Phase Temperature ◽  
Matter Phase ◽  
The Magnetic Field

The main properties of magnetized strangelets, namely, their energy per baryon, radius and electric charge, are studied in the unpaired strange quark matter phase. Temperature effects are taken into account in order to study their stability compared to the 56Fe isotope and non-magnetized strangelets within the framework of the MIT bag model. It is concluded that the presence of a magnetic field tends to stabilize more the strangelets, even when temperature is considered. We find that the electric charge is modified in the presence of the magnetic field, leading to higher charge values for magnetized strangelets, when compared to the non-magnetized case.

STRANGE STARS AT VACUUM PRESSURE DEPENDENT ON QUARK DENSITY

2017 ◽  
Vol 51 (1 (242)) ◽  
pp. 71-76
Author(s):  
Yu.L. Vartanyan ◽  
A.K. Grigoryan ◽  
H.A. Shahinyan
Keyword(s):  
Quark Matter ◽  
Strange Quark ◽  
Equations Of State ◽  
Strange Quark Matter ◽  
Vacuum Pressure ◽  
Equilibrium Equations ◽  
Strange Stars ◽  
Mit Bag Model ◽  
Limiting Value ◽  
Tov Equation

Equation of state of strange quark matter has been studied in the framework of MIT bag model, when vacuum pressure $B$ depends on concentration of baryons $n$. The actuality of such studies is conditioned by the increasing of quark matter density from surface to star center. In the literature there exist different representations of function $B(n)$. In the present work Gaussian parametrization is used, which is based on the idea of existence of asymptotic limiting value of this parameter. For four groups of parameters the equations of state of quark matter were determined. The main integral parameters of star configurations were obtained by numerically integrating of star equilibrium equations (the TOV equation). In the considered case it turns that when vacuum pressure dependence on concentration of baryons is taken into account, configurations of strange stars have maximal masses less than two solar masses.   Erratum: Proc. YSU A: Phys. Math. Sci. 52 (2018), 68

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