NDAF的中微子湮灭模型解释GRB 090510爆发

The Neutrino Annihilation Model of NDAF Explains the Explosion of GRB 090510

围绕着恒星级黑洞的中微子主导吸积盘可以通过盘上发出的中微子湮灭为伽玛暴提供能量。对于黑洞超吸积系统,吸积可能引起黑洞特征的极大演化,这会进一步引起中微子光度的演化。考虑不一样的平均吸积率和初始黑洞参数,通过吸积系统的演化分析中微子湮灭光度和总的中微子湮灭能量随时间的变化。同时计算了短暴GRB 090510的中微子湮灭能量并与理论预测的结果比对,发现中微子主导吸积盘的中微子湮灭能量的理论预测值远高于观测值,意味着这种模型可能提供GRB 090510爆发所需要的能量。

A neutrino-dominated accretion disk around a stellar-mass black hole can power a gamma-ray burst via annihilation of neutrinos launched from the disk. For the black hole hyperaeeretion system, accretion shouht trigger the violent evolution of the black hole＇s characteristics, which turther leads to the evolution of the neutrino annihilation luminosity. In this paper, we analyze the mean time-dependent neutrino annihilation luminosity and the total neutrino annihilation energy via the evolution of the accretion system by setting dit]~rent mean accretion rates and initial black hole parametels. Furthermore, we calculate the total neutrino annihilation energy of the short GRB 090510 by using observational data, and compare with the resuhs of theoretical analysis. It is found that the theoretical value of the annihilation energy of NDAF neutrinos is much higher than the observed value, which means that the mechanism can explain the explosion of the short GRB 090510.