超流物质非平衡直接Urca过程的反应率与中微子辐射率

Reaction Rate and Neutrino Emissivity of Non-equilibrium Direct Urca with Nucleon Superfluidity

在中子星的热演化过程中,直接Urca可能是非平衡的。本文计算并讨论了各种核子超流存在时对非平衡直接Urca过程净反应率和中微子辐射率的影响,发现当化学偏离量超过一定值的时候,净反应率和中微子辐射率会迅速增强,根源可能在于化学偏离量足够大会破坏超流Cooper对。

In the thermal evolution of neutron star, discuss the influence of nucleon superfluidity with direct Urca processes may be out of equilibrium. We calculate and various types on the reaction rate and neutrino emissivity of non- equilibrium direct Urca processes. The numerical results show that the departure is large enough, the reaction rate and neutrino emissivity are enhanced rapidly. This probably results from the broken of Cooper pairs when the chemical imbalance is large enough.