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Record 52 of 4128
Nitrogen airglow sources - Comparison of Triton, Titan, and earth
Author and Affiliation:
Strobel, Darrell F.(Johns Hopkins University, Baltimore, MD, United States)
Meier, R. R.(Johns Hopkins Univ., Baltimore, MD, United States)
Summers, Michael E.(U.S. Navy, E.O. Hulburt Center for Space Research, Washington, DC, United States)
Strickland, Douglas J.(Computational Physics, Inc., Annandale, VA, United States)
Abstract: The individual contributions of direct solar excitation, photoelectron excitation, and magnetospheric electron excitation of Triton and Titan airglow observed by the Voyager Ultraviolet Spectrometer (UVS) are quantified. The principal spectral features of Triton's airglow are shown to be consistent with precipitation of magnetospheric electrons with power dissipation about 500 million W. Solar excitation rates of the dominant N2 and N(+) emission features are factors of 2-7 weaker than magnetospheric electron excitation. On Titan, the calculated disk center and bright limb N(+) 1085 A intensities due to solar excitation agree with observed values, while the 970 A feature is mostly N21 c5 band emission. The calculated LBH intensity by photoelectrons suggests that magnetospheric electrons play a minor role in Titan's UV airglow. On earth, solar/photoelectron excitation explains the observed N(+) 1085 A and LBH intensites and accounts for only 40 percent of the N(+) 916 A intensity.
Publication Date: Apr 01, 1991
Document ID:
19910050764
(Acquired Nov 28, 1995)
Accession Number: 91A35387
Subject Category: LUNAR AND PLANETARY EXPLORATION
Document Type: Journal Article
Publication Information: Geophysical Research Letters; p. 689-692; (ISSN 0094-8276); 18
Publisher Information: United States
Contract/Grant/Task Num: NAGW-648; NAGW-1181
Financial Sponsor: NASA; United States
Organization Source: Johns Hopkins Univ.; Baltimore, MD, United States
Hulburt (E. O.) Center for Space Research; Washington, DC, United States
Computational Physics, Inc.; Annandale, VA, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AIRGLOW; EARTH ATMOSPHERE; NITROGEN IONS; SATELLITE ATMOSPHERES; TITAN; TRITON; COMPARISON; MAGNETOSPHERIC ELECTRON DENSITY; UPPER ATMOSPHERE
Imprint And Other Notes: Geophysical Research Letters (ISSN 0094-8276), vol. 18, April 1991, p. 689-692.
Availability Source: Other Sources
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