Bulk viscosity of strange quark matter in a density-dependent quark mass model and dissipation of thermode in strange stars

2004 ◽  
Vol 70 (1) ◽  
Author(s):  
Zheng Xiaoping ◽  
Liu Xuewen ◽  
Kang Miao ◽  
Yang Shuhua
Keyword(s):  
Bulk Viscosity ◽  
Quark Matter ◽  
Quark Mass ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Mass Model ◽  
Strange Stars ◽  
Density Dependent

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

Strange quark matter and proto-strange stars in a baryon density-dependent quark mass model

2022 ◽  
Author(s):  
Huaimin Chen ◽  
Cheng-Jun Xia ◽  
Guang-Xiong Peng
Keyword(s):  
Free Energy ◽  
Quark Matter ◽  
Quark Mass ◽  
Strange Quark ◽  
Baryon Density ◽  
Strange Quark Matter ◽  
Mass Model ◽  
Relativistic Limit ◽  
Strange Stars ◽  
Mass Scaling

Abstract The properties of strange quark matter and the structures of (proto-)strange stars are studied within the framework of a baryon density-dependent quark mass model, where a new quark mass scaling and self-consistent thermodynamic treatment are adopted. Our results show that the perturbative interaction has a strong impact on the properties of strange quark matter. It is found that the energy per baryon increases with temperature, while the free energy decreases and eventually becomes negative. At fixed temperatures, the pressure at the minimum free energy per baryon is zero, suggesting that the thermodynamic self-consistency is preserved. Additionally, the sound velocity v in quark matter approaches to the extreme relativistic limit (c=p3) as the density increases. By increasing the strengths of confinement parameter D and perturbation parameter C, the tendency for v to approach the extreme relativistic limit at high density is slightly weakened. For (proto-)strange stars, in contrast to the quark mass scalings adopted in previous publications, the new quark mass scaling can accommodate massive proto-strange stars with their maximum mass surpassing twice the solar mass by considering the isentropic stages along the star evolution line, where the entropy per baryon of the star matter was set to be 0.5 and 1 with the lepton fraction Yl=0.4.

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

Magnetostatics of a superconducting quark star

1993 ◽  
Vol 71 (9-10) ◽  
pp. 488-492 ◽  
Author(s):  
Somenath Chakrabarty
Keyword(s):  
Relativistic Theory ◽  
Quark Mass ◽  
Strange Quark ◽  
Quark Star ◽  
Fermion System ◽  
Superconducting Properties ◽  
Mass Model ◽  
Density Dependent ◽  
System A ◽  
Theory Of Superconductivity

The superconducting properties of a strange quark star are investigated using the relativistic theory of superconductivity for a fermion system. A dynamical density-dependent quark mass model is used for confinement. The type of superconductivity and the magnetostatic properties for the material of the star are also studied.

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