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The Origin of Weak Emission-Line AGNs

Published online by Cambridge University Press:  21 February 2013

Yuan Liu ,
Jin Zhang  and
Shuang-Nan Zhang
Yuan Liu
Affiliation:
Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918-3, Beijing 100049, China (liuyuan@ihep.ac.cn)
Jin Zhang
Affiliation:
College of Physics and Electronic Engineering, Guangxi Teachers Education University, Nanning, Guangxi 530001, China
Shuang-Nan Zhang
Affiliation:
Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918-3, Beijing 100049, China (liuyuan@ihep.ac.cn)
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Abstract

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Some abnormal AGNs are discovered in the SDSS data recently. The usual UV/optical emission lines are exceptionally weak in their UV/optical spectroscopy, though the shapes and luminosities of their continua are comparable with that of the normal AGNs. We investigated the optical variations and the near-infrared spectra of these weak emission-line AGNs. We propose that these AGNs can be interpreted as the early stage of an active cycle of AGNs.

Keywords

Quasars: emission linesline: formationinfrared: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 267 - 268
Copyright
Copyright © International Astronomical Union 2013

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