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Astron. Astrophys. 330, L45-L48 (1998)

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Letter to the Editor

A Statistical Analysis of [FORMULA] PA for EGRET-Detected AGNs

X.Y. Hong, D.R. Jiang and Z.Q. Shen

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

Received 3 July 1997 / Accepted 13 November 1997


A statistical analysis of position angle differences ([FORMULA] PA) between small- and large-scale structures of EGRET-detected AGNs has been made. The results show that [FORMULA] -ray quasars have the alignment of radio jets, while [FORMULA] -ray BL Lac objects have large [FORMULA] PA. This may contribute to a better understanding of different blazar types and of the AGN unification scheme.

Key words: radio continuum: EGRET-detected AGNs – galaxies: radio jets

Send offprint requests to: X.Y.Hong(e-mail: xhong@center.shao.ac.cn)

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© European Southern Observatory (ESO) 1998

Online publication: January 16, 1998