Abstract
view Abstract Citations (29) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Near-Infrared Oxygen i Lines of the Planetary Nebula IC 4997 Rudy, Richard J. ; Rossano, George S. ; Puetter, R. C. Abstract Spectrophotometry from 0.84 to 1.32 microns of the compact planetary nebula (PN) IC 4997 is presented. The O I 11287 A line is found to be comparable in strength to O I 8446 A. This observation, together with the absence of the O I line at 13164 A, indicates that Bowen fluorescence by Ly-alpha is the principal excitation mechanism for these oxygen lines. Although this is believed to be the process which creates the 8446 A line in the hot, partially ionized zones of Seyfert galaxies, such regions are not present in IC 4997. An alternative mechanism in which the O I lines arise from Bowen fluorescence in the cool, neutral shell of gas which surrounds IC 4997 is considered. Publication: The Astrophysical Journal Pub Date: November 1989 DOI: 10.1086/168060 Bibcode: 1989ApJ...346..799R Keywords: Infrared Spectra; Near Infrared Radiation; Oxygen; Planetary Nebulae; Absorption Cross Sections; Emission Spectra; Fluorescence; Gas Ionization; H Alpha Line; Lyman Beta Radiation; Astrophysics; INFRARED: SPECTRA; NEBULAE: INDIVIDUAL ALPHANUMERIC: IC 4997; NEBULAE: PLANETARY; RADIATION MECHANISMS full text sources ADS | data products SIMBAD (1)
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