Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...92..615z&link_type=abstract
The Astrophysical Journal Supplement Series, vol. 92, no. 2, p. 615-617
Astronomy and Astrophysics
Astrophysics
Active Galactic Nuclei, Gamma Ray Absorption, Gamma Rays, Pair Production, Plasma Jets, Ultraviolet Radiation, X Rays, Astronomical Models, Photoproduction
Scientific paper
Recent observations by the Compton Gamma-Ray Observatory give evidence for the existence of a type of blazar with strong gamma-ray emission. Data obtained by EGRET for the quasar 3C 279 show a spectrum between 100 MeV and 10 GeV. Photons of such energies should interact with the X-rays and produce positron/electron pairs. If the optical depth against pair production for the gamma rays is large (tau(gamma gamma) greater than 1), the gamma-ray spectrum should be affected. The importance of this process has been pointed out by, e.g., Maraschi, Ghisellini, & Celotti (1992). Several works (e.g., Dermer 1993; Zbyszewska 1993; Sikora, Begelman, & Rees 1993) concerning gamma-ray radiation from quasar 3C 279 have proposed a model in which the gamma rays are produced via interaction between a moving cloud of relativistic electrons and external soft photons. The presence of gamma rays in active galactic nuclei spectra gives constraints on the localization and the luminosity of the medium which produces ultraviolet/X-ray photons. We investigate what conditions should be fulfilled in the above model to avoid the absorption of the gamma rays due to pair production.
No associations
LandOfFree
Interaction of ultraviolet and X-ray radiation with gamma rays produced by a jet in active galactic nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Interaction of ultraviolet and X-ray radiation with gamma rays produced by a jet in active galactic nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interaction of ultraviolet and X-ray radiation with gamma rays produced by a jet in active galactic nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1863146