大质量中子星内部中微子辐射的相对论效应研究

Studies on relativistic effect on neutrino emission in neutron stars with large masses

通过相对论平均场理论和相关冷却理论,我们采用四组常用的核物质参数组(GL85,GM1,GPS250,GPS300)研究含有相对论效应和不含相对论效应两种情况下的大质量中子星冷却性质.结果表明,中微子辐射的相对论效应在大质量中子星(比如脉冲星PSR J1614-2230)内部表现得较为显著.四组参数组中,GPS300参数组导致中微子发射率下降的幅度最大,而GM1参数组使得冷却速度降幅最明显.

In the relativistic mean field theory and cooling theories, we study cooling properties of neutron stars in both relativistic and non -relativistic ways in the four classical parameter sets, GL85, GM1, GPS250 and GPS300. The results indicate that relativistic effect on neutrino emission is obviously in massive neutron stars. GPS300 set leads to the biggest fall in neutrino emissivity between relativistic and non - relativistic cases in the four sets. Relativistic effect makes the neutron star cool more slowly, and we find that GM1 set leads to the largest disparity in cooling rate between relativistic and non -relativistic cases.