Fireball Heated by Neutrinos
Fireball Heated by Neutrinos
复制标题
中微子加热的火球
DOI：
10.1086/344107
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Iwamoto
中科院分区：
文献类型：
--
作者：
K. Asano;S. Iwamoto
The fireball, the promising model of the gamma-ray burst (GRB), is an opaque radiation plasma, whose energy is significantly greater than its rest mass. We numerically simulate the evolution of the fireball heated by the neutrino-antineutrino annihilation process for the spherically symmetric case. We also derive analytical energy and momentum deposition rates via neutrino scattering with thermalized electron-positron pairs in the fireball. In our simulation the matter is provided around the neutrinosphere before neutrinos start to be emitted, and the energy is injected during a finite period of time tdur. In the acceleration regime the matter shell is pushed from behind by radiation pressure. The Lorentz factor of the shell reaches the maximum value η at r ≃ η2ctdur. After the fireball enters the coasting regime, the velocity distribution in the shell becomes very flat. The shell expansion rate dW/dr can be much smaller than η-2. The runaway of temperature of the fireball due to neutrino scattering with electron-positron pairs does not occur in most cases. The energy deposition due to scattering is not so significant.
DOI：
10.1086/308371
发表时间：
1999-08
期刊：
The Astrophysical Journal
影响因子：
--
作者：
P. M. M. R. P. S. U. I. Physics-P.-M.-M.-R.-P.-S.-U.-I.-Physics-2264718187;Ucsb Inst. of Astronomy;Cambridge University
通讯作者：
P. M. M. R. P. S. U. I. Physics-P.-M.-M.-R.-P.-S.-U.-I.-Physics-2264718187;Ucsb Inst. of Astronomy;Cambridge University