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FeII, FeI Emission Lines from Accretion Disks: An Explanation for “FeII Problem” in AGNs?

Published online by Cambridge University Press:  19 July 2016

Chunyan Wei ,
Fuzhen Cheng  and
Junhan You
Chunyan Wei
Affiliation:
Center for Astrophysics, University of Science and Technology of China, Hefei 230026, P. R. China
Fuzhen Cheng
Affiliation:
Center for Astrophysics, University of Science and Technology of China, Hefei 230026, P. R. China
Junhan You
Affiliation:
Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, P. R. China

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For the solution of the puzzling “FeII problem” in active galactic nuclei(AGNs) (Netzer et al. 1983; Wills et al. 1985), we pay our attention to optical band and suggest: (1)the observed so-called “FeII emission lines” features may be blending of FeII multiples and FeI multiples. Our previous work(Wei et al. 1993) has showed that there are many FeI emission lines whose wavelength lie around the observed “FeII emission lines” features. In fact, FeI emission lines have been observed in the spectrum of PHL 1092(Bergeron et al. 1980; Cheng et al. 1993). (2)the emission lines from accretion disk must be considered besides the emission from broad line region.

Type
Poster Contributions: Line Studies
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 463
Copyright
Copyright © Kluwer 1994 

References

Bergeron, J. and Kunth, D., 1980, A&A , 85, L11.Google Scholar
Cheng, F. Z., et al., 1993, in preparation.Google Scholar
Netzer, H. and Wills, B. 1983, ApJ , 275, 445.CrossRefGoogle Scholar
Wei, C. Y., Cheng, F. Z. and You, J. H. et al., 1993, Kexue Tongbao , in press.Google Scholar
Wills, B., Netzer, H. and Wills, D., 1985, ApJ , 288, 94.Google Scholar