Guo, H , Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China.
部门归属:
Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China; Peking Univ, MOE, Lab Heavy Ion Phys, Beijing 100871, Peoples R China; Peking Univ, Dept Phys, Beijing 100871, Peoples R China; Natl Lab heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要:
In the framework of a chiral hadronic model it has been numerically proven that the parabolic expansion with respect to delta(2) at finite density and temperature is a good approximation in the relativistic mean field theory. It is also shown that the proton fraction in the modified Urca process is considerably restrained in comparison with that of the direct Urca process. Then, we discuss the influences of the density-dependent and temperature-dependent asymmetry energy on the proton fraction in hot neutron star matter.
