Astron. Astrophys. 358, 841-844 (2000)

Research Note

Relation between -rays and emission lines for the -ray loud blazars

J.H. Fan

¹ Center for Astrophysics, Guangzhou Normal University, Guangzhou 510400, P.R. China (jhfan@guangztc.edu.cn)
² Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center (CAS-PKU.BAC), Beijing, P.R. China
³ CCAST(World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China

Received 20 January 2000 / Accepted 30 March 2000

Abstract

The relation between the -ray and the emission line luminosities for a sample of 36 -ray loud blazars is investigated; an apparent correlation between them, , with a correlation coefficient and a chance probability of , is found. It is found, however, that there is no intrinsic correlation between them: the apparent correlation is due to the redshift dependence in a flux-limited sample. Thus no evidence is found to support the argument that the up-scattered soft photons are from the broad emission lines. Our analysis does not conflict with the SSC model. The disk-jet symbiosis and radio/-ray correlation found in the literature are also discussed. The radio/-ray correlation may be an apparent correlation caused by the boosting effect since both bands are strongly beamed.

Key words: galaxies: quasars: emission lines galaxies: jets galaxies: nuclei galaxies: active

SIMBAD Objects

Contents

• 1. Introduction
• 2. Correlation
  • 2.1. Data
  • 2.2. Result
• 3. Discussion
• Acknowledgements
• References

© European Southern Observatory (ESO) 2000

Online publication: June 20, 2000
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