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infrared studies of galactic nebulae. iv - continuum and line radiation from planetary nebulae.Observations are reported of the detection of IR radiation from several planetary nebulae not previously known to be radiating at these wavelengths. Broad spectral bandwidth observations indicate that ir radiation in excess of that expected from atomic processes is a common phenomenon among these objects. Investigations with narrow spectral bandwidth show that in a few cases the energy in the 10.52-micron line is a significant fraction of the total energy observed in the broad-band measurements and in other cases a relatively small fraction of the total radiation. Other observations on two sources with narrow spectral bandwidth adjacent to the 10.52-micron line indicate that at these wavelengths a true continuum of radiation exists as well as lines. The results are discussed in relation to visual and radio-wavelength data.
Document ID
19720037721
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gillett, F. C.
Merrill, K. M.
(California, University San Diego, Calif., United States)
Stein, W. A.
(California, University San Diego, Calif.; Minnesota, University, Minneapolis, Minn., United States)
Date Acquired
August 6, 2013
Publication Date
March 1, 1972
Publication Information
Publication: Astrophysical Journal
Volume: 172
Subject Category
SPACE SCIENCES
Funding Number(s)
CONTRACT_GRANT: NGR-05-005-004
CONTRACT_GRANT: NGR-05-009-142
CONTRACT_GRANT: NGR-05-005-003
Distribution Limits
Public
Copyright
Other