Mass-Density-Dependent Quark Model with Thermodynamic Self-consistency and Hybrid Stars

Bao Tmurbagan; LIU Guang-Zhou; ZHU Ming-Feng

Chinese Physics C> 2006, Vol. 30> Issue(S2) : 255-257

Mass-Density-Dependent Quark Model with Thermodynamic Self-consistency and Hybrid Stars

Center for Theoretical Physics, Institute of Physics, Jilin University, Changchun 130021, China2 Institute of Physics and Electronic, Nanyang Normal University, Nanyang 473061, China

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Abstract：
Upon application of the mass-density-dependent quark model with thermodynamic self-consistency, we investigate the bulk properties of hybrid stars and calculate the particle fraction and equation of state(EOS) for hybrid star matter. Numerical results indicate that the pressure extra term deriving from self-consistently thermodynamical treatment can soften the EOS, put off the appearence of phase transition and decrease the maximum mass for a hybrid star from 2.4M_⊙(without pressure extra term) to 1.8M_⊙ with corresponding radius from 15km to 12km. Similar to the Nambu-Jona-Lasinio(NJL) model, this model is suitable for describing the massive hybrid stars.

References

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Bao Tmurbagan, LIU Guang-Zhou and ZHU Ming-Feng. Mass-Density-Dependent Quark Model with Thermodynamic Self-consistency and Hybrid Stars[J]. Chinese Physics C, 2006, 30(S2): 255-257.

Bao Tmurbagan, LIU Guang-Zhou and ZHU Ming-Feng. Mass-Density-Dependent Quark Model with Thermodynamic Self-consistency and Hybrid Stars[J]. Chinese Physics C, 2006, 30(S2): 255-257. shu

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Received: 2006-10-18
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Mass-Density-Dependent Quark Model with Thermodynamic Self-consistency and Hybrid Stars

Corresponding author: LIU Guang-Zhou,

Center for Theoretical Physics, Institute of Physics, Jilin University, Changchun 130021, China2 Institute of Physics and Electronic, Nanyang Normal University, Nanyang 473061, China

Received Date: 2006-10-18

Accepted Date: 1900-01-01

Available Online: 2006-01-03

Abstract: Upon application of the mass-density-dependent quark model with thermodynamic self-consistency, we investigate the bulk properties of hybrid stars and calculate the particle fraction and equation of state(EOS) for hybrid star matter. Numerical results indicate that the pressure extra term deriving from self-consistently thermodynamical treatment can soften the EOS, put off the appearence of phase transition and decrease the maximum mass for a hybrid star from 2.4M_⊙(without pressure extra term) to 1.8M_⊙ with corresponding radius from 15km to 12km. Similar to the Nambu-Jona-Lasinio(NJL) model, this model is suitable for describing the massive hybrid stars.

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Mass-Density-Dependent Quark Model with Thermodynamic Self-consistency and Hybrid Stars

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