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The spectrum of the Jovian dayglow observed at 3 A resolution with the Hopkins ultraviolet telescopeUltraviolet spectra of the Jovian equatorial dayglow in the spectral range 830-1850 A were obtained at about 3 A resolution. The observed spectrum is dominated by electron impact excitation of the H2 Lyman and Werner band systems. Solar Lyman-beta induced fluorescence in the (6, nu-double prime) Lyman band progression is clearly identified in five distinct P(1) lines, and the contribution of solar fluorescence to the total 2.3 kR slit-averaged H2 emission rate is estimated to be 17-22 percent. The electron excitation spectrum is characterized by a relative weakness of the Werner band system and the absence of cascade contributions to the Lyman system and is very similar to that of the south polar aurora. The integrated H2 emission rate in the 900-1100 A band is a factor of two lower than that measured by the Voyager UVS. Based on model calculations, photoelectron excitation does not appear able to account for the amount of observed electron-excited H2 emission.
Document ID
19930046555
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Feldman, P. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mcgrath, M. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Moos, H. W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Durrance, S. T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Strobel, D. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Davidsen, A. F.
(Johns Hopkins Univ. Baltimore, MD, United States)
Date Acquired
August 16, 2013
Publication Date
March 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 406
Issue: 1
ISSN: 0004-637X
Subject Category
Lunar And Planetary Exploration
Accession Number
93A30552
Funding Number(s)
CONTRACT_GRANT: NAS5-27000
Distribution Limits
Public
Copyright
Other

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