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Astron. Astrophys. 341, 74-80 (1999)

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A correlation analysis of flux ratios and the Doppler factor for EGRET AGN sources

L.H. Huang, D.R. Jiang and Xinwu Cao

Shanghai Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai, 200030, P.R. China

Received 20 January 1998 / Accepted 29 June 1998


We present a correlation analysis between the flux ratio of high-energy [FORMULA]-ray emission to synchrotron emission and the Doppler factor for a sample of EGRET AGNs. The result favors a model that attributes the EGRET emission of AGNs to inverse-Compton scattering on photons external to the jet.

Key words: galaxies: kinematics and dynamics – galaxies: nuclei – galaxies: jets

Send offprint requests to: D.R. Jiang, (djiang@center.shao.ac.cn)

© European Southern Observatory (ESO) 1999

Online publication: November 26, 1998