Electron-Positron Pairs in a Mildly Relativistic Plasma in Active Galactic Nuclei

Details Electron-Positron Pairs in a Mildly Relativistic Plasma in Active Galactic Nuclei Electron-Positron Pairs in a Mildly Relativistic Plasma in Active Galactic Nuclei

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.119..217t&link_type=abstract

Astrophysics and Space Science, Volume 119, Issue 1, pp.217-219

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We investigate the electron-positron pair concentration in an optically thin mildly relativistic plasma which is supposed to exist in active galactic nuclei. Firstly the equilibrium concentration is calculated when copious soft photons are supplied through the cyclotron higher harmonics. It is shown that the attainable states of the plasma are strongly restricted. Secondly we examine the pair production in a hot accretion plasma around a massive black hole, comparing relevant time scales. We find that significant pair production occurs when the accretion rate is moderately high and the infall velocity is slow compared to the free fall.

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