Abstract
view Abstract Citations (124) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Spectroscopy of the 3 micron emission features. Geballe, T. R. ; Lacy, J. H. ; Persson, S. E. ; McGregor, P. J. ; Soifer, B. T. Abstract High-spectral-resolution observations of the 3.3 and 3.4 microns features in the three planetary nebulae NGC 7027, IC 418, and BD +30 deg 3639, in the H II region S106, and in the 'red rectangle' HD 44179 are presented. The profile of the unidentified 3.3 microns emission feature is similar in all five sources. The unidentified feature previously referred to as the 3.4 microns feature actually consists of two components, a low-level emission from 3.35 to 3.60 microns and a narrow emission peak at 3.40 microns. The strength of the latter feature relative to that of the 3.3 microns feature varies by a a factor of three from source to source. The origin and properties of these features may be explained by further development of the small-grain models of Sellgren (1984) and Leger and Puget (1984). Publication: The Astrophysical Journal Pub Date: May 1985 DOI: 10.1086/163182 Bibcode: 1985ApJ...292..500G Keywords: Astronomical Spectroscopy; Emission Spectra; Infrared Astronomy; Planetary Nebulae; H Ii Regions; High Resolution; Line Spectra; Spectral Resolution; Stellar Mass Ejection; Astrophysics full text sources ADS | data products SIMBAD (6)
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