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Relativistic Neutrons in Active Galactic Nuclei

Published online by Cambridge University Press:  07 August 2017

Marek Sikora ,
Bronisław Rudak  and
Mitchell Begelman
Marek Sikora
Affiliation:
N. Copernicus Astronomical Center, PAN, 00-716 Warszawa, Bartycka 18, Poland
Bronisław Rudak
Affiliation:
N. Copernicus Astronomical Center, PAN, 87-100 Torun, Chopina 12/18, Poland
Mitchell Begelman
Affiliation:
Joint Institute for Laboratory Astrophysics, National Bureau of Standards and Univ. of Colorado Boulder, CO 80309-0440

Extract

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A substantial fraction of the radiation from an active galactic nucleus (AGN) is apparently nonthermal in origin, and is probably produced by ultrarelativistic electrons. How much energy goes into relativistic protons is uncertain, but it is likely to be comparable to the electron energy or larger. Indeed, several authors (Sikora et al. 1987; Kazanas and Ellison 1986; Zdziarski 1986) have shown that proton-photon and proton-proton collisions can be efficient sources of relativistic pairs in the central engine of an AGN. Thus it is not necessary for electrons to be accelerated directly in AGNs, provided that protons are accelerated with high enough efficiency.

Type
Part 3: X-rays and the Central Source
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 215 - 216
Copyright
Copyright © Kluwer 1989 

References

Kazanas, D., and Ellison, D. C. 1986, Ap. J. 304, 178.CrossRefGoogle Scholar
Sikora, M., Kirk, J. G., Begelman, M. C., and Schneider, P. 1987, Ap. J. Lett. 320, L81.Google Scholar
Zdziarski, A. A. 1986, Ap. J. 305, 45.Google Scholar