Other
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...79..285k&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 79, no. 2, April 1992, p. 285-301.
Other
28
Emission Spectra, Line Spectra, Seyfert Galaxies, Astronomical Spectroscopy, Balmer Series, Charge Coupled Devices, H Alpha Line, H Beta Line
Scientific paper
H-alpha and H-beta broad emission-line profiles of the Seyfert galaxy Arakelian 120 from the past 10 yr, representing over 100 spectroscopic observations. The broad emission-line profiles of the Balmer lines are complex in structure and variable; the profile variations themselves are complex. Separate emitting components within the profiles are isolated through profile differencing and profile fitting. If Gaussian-like, at least four separate components are present in the broad Balmer emission lines. The broad emission-line profiles of other emission lines (optical and UV) are also presented, and evidence is given for a stratified BLR. Using the results of Joly, it is demonstrated that the Fe II multiplets 25 and 36 (in addition to m42) may be present in the H-beta profile and in its 'red shelf'.
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