NDAF的中微子湮灭模型解释GRB 090510的爆发

Subjects: Astronomy >> Astronomical Instruments and Techniques submitted time 2018-06-22 Cooperative journals: 《天文研究与技术》

林一清； 程再军

Abstract： 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 hyperaccretion system, accretion should trigger the violent evolution of the black hole’s characteristics, which further 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 the different mean accretion rates and initial black hole parameter. Furthermore, we calculate the total neutrino annihilation energy of the short GRB 090510 by observational data, and compare with the results of theoretical analysis. It is found that the theoretical valre of the annihilation energy of NDAF neutrinos is much higher than that of the observed values, which means that the mechanism may can explain the explosion of the short GRB 090510.

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