NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Fluorescent vibration-rotation excitation of cometary C2The statistical equilibrium equations that determine the population densities of the energy levels in cometary C2 molecules due to fluorescent excitation are examined in detail. The adopted model and molecular parameters are discussed, and a theoretical estimate is made of the two intercombination transition moments. From the theoretical population densities in the various rotational levels, flux ratios and synthetic emission profiles are calculated as functions of the a 3Pi(u) - X 1Sigma(g)+ and the c 3Sigma(u)+ - X 3Sigma(g)+ intercombination transition moments. The influence of each of these two transitions separately on the vibrational and rotational excitation temperatures is investigated. The observed emission spectra of the (0,0) Swan band in Comet Halley are presented and compared to the synthetic profiles.
Document ID
19890043817
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gredel, Roland
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Van Dishoeck, Ewine F.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Black, John H.
(Steward Observatory Tucson, AZ, United States)
Date Acquired
August 14, 2013
Publication Date
March 15, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 338
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A31188
Funding Number(s)
CONTRACT_GRANT: NSF PHY-86-20266
CONTRACT_GRANT: NSG-7421
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available