弱磁场及甚强磁场下奇异夸克物质Urca过程的中微子能量损失率

The Neutrino Emissivity of Urca Process of Strange Quark Matter in Weak and Ultra Strong Magnetic Field

研究了磁场对奇异星模型中夸克直接Urca过程的中微子能量损失率的影响,首先改进了弱场条件下的近似计算方法,这一方法可以推广到其他弱作用过程．在甚强磁场下,严格地计算Urca过程的中微子能量损失率,结果显示辐射率强烈地依赖于磁场,与磁场的二次方成正比,更重要的是对温度的依赖关系不同于弱场及没有磁场时的情形．

The effect of magnetic field on the neutrino emissivity of quark direct Urca process in strange stars is investigated. Firstly, calculating approach in weak magnetic field is improved, and it may be generalized to other weak interactions. Furthermore the neutino emissivity computed stricly for ultra magnetic field shows a strong dependce on magnetic field （proportion to the second power of magnetic field）, and the emissivity depends on T5 instead of conventional T^6.