Bag model and quark star

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.065017· OSTI ID:21421199

Hua, Li ^[1]; Xinlian, Luo ^[2]; Hongshi, Zong ^[1]

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1. Department of Physics, Nanjing University, Nanjing 210093 (China)
2. Department of Astronomy, Nanjing University, Nanjing 210093 (China)

In this paper, incorporating the property of the vacuum negative pressure, namely, the bag constant, we present a new model of the equation of state (EOS) of quark matter at finite chemical potential and zero temperature. By comparing our EOS with Fraga et al.'s EOS and SQM1 model, one finds that our EOS is softer than Fraga et al.'s EOS and SQM1 model. The reason for this difference is analyzed. With these results we investigate the structure of a quark star. A comparison between our model of the quark star and other models is made. The obtained mass of the quark star is 1.3{approx}1.66M{sub {center_dot}}and the radius is 9.5{approx}14 Km. One can see that our star's compactness is smaller than that of the other two models.

• OSTI ID: 21421199
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevD.82.065017; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
COMPARATIVE EVALUATIONS
EQUATIONS OF STATE
MASS
QUARK MATTER
QUARKS
STARS
COMPOSITE MODELS
EQUATIONS
EVALUATION
EXTENDED PARTICLE MODEL
FERMIONS
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
QUARK MODEL