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arXiv · astro-ph/0611142

Generation of a Fireball in AGN Hot Plasmas

Katsuaki Asano·Fumio Takahara
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Abstract

Motivated by relativistic jets observed in active galactic nuclei (AGN), we simulate outflows of electron-positron pairs strongly coupled with photons from normal electron-proton plasmas. Using multi-fluid approximation and a Monte Carlo method of radiative transfer, we obtain spherically symmetric, steady solutions of radiation and pair outflows for the luminosity $L \leq 10^{47}$ erg ${\rm s^{-1}}$. For microphysics, Coulomb scattering, Compton scattering, bremsstrahlung, electron-positron pair annihilation and creation are taken into account. Although a significant amount of pairs outflow by powerful radiative force with a mildly relativistic velocity, the temperature is not high enough to avoid pair annihilation before the fireball becomes optically thin to scattering. Several caveats in the simulations are also discussed.

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Katsuaki Asano, Fumio Takahara. 2006-11-04. Generation of a Fireball in AGN Hot Plasmas. https://doi.org/10.1086/509756

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