NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-19 T07:06:00 PDT
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For refcode 1988A&A...192...87J:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1988A&A...192...87J Contribution of Fe II to the asymmetry of H{beta} in active galactic nuclei M. Joly Observatoire de Paris, Section de Meudon, F-92195 Meudon Principal Cedex, France Received May 6, accepted August 28, 1987 Summary. In optical Fe II emitters, the redward asymmetry of H{beta} is partly due to a blend of Fe II lines from multiplets 42, 36, and 25. A new attempt is made to quantify the contribution of Fe II using the results of theoretical work on the formation of the Fe II lines in AGN. A relation is found between this contribution and the easily observed Fe II blend around {lambda} 4750. It is argued that the stronger the Fe II emitter, the larger the contribution of multiplets 36 and 25. A comparison with previous work shows that when the Fe II contribution is restricted to the observed intensity of multiplet 42, it is often underestimated and that in Fe II emitters the H{beta} asymmetry is often overestimated. Key words: galactic nuclei - emission lines - profile - Fe II lines
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