Generation of a Fireball in AGN Hot Plasmas

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 $L\le 10^{47}$ erg ${\mathrm{s}}^{-1}$. 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.

arXiv comment20 pages, 7figures. accepted for publication in ApJ

References in corpus (11)

• An X-ray study of magnetic field strengths and particle content in FRII radio sources
• The matter content of the jet in M87: evidence for an electron-positron jet
• Hydrodynamics of Relativistic Fireballs
• Kinetic Luminosity and Composition of Active Galactic Nuclei Jets
• Detection and Measurement of Parsec-Scale Circular Polarization in Four AGN
• Constraints on the energetics and plasma composition of relativistic jets in FR II sources
• Pair Plasma Dominance in the Parsec-Scale Relativistic Jet of 3C345
• Relativistic Outflow of Electron-Positron Pair Plasma from a Wien Equilibrium State
• Formation and Radiation Acceleration of Pair Plasmoids Near Galactic Black Holes
• Wien Fireball Model of Relativistic Outflows in Active Galactic Nuclei
• Fireball Heated by Neutrinos

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• Calorimetry of Active Galactic Nucleus jets: testing plasma composition in Cygnus A
• Evidence for a significant mixture of electron/positron pairs in FRII jets constrained by cocoon dynamics
• Prevalence of Extra Power-Law Spectral Components in Short Gamma-Ray Bursts
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• A Relativistic Electron-Positron Outflow from a Tepid Fireball
• Energy and Momentum Transfer via Coulomb Frictions in Relativistic Two Fluids
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