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The Spectrum of Jupiter's Great Red Spot: The Case for Ammonium Hydrosulfide (NH4SH)Here we present new ultraviolet-visible spectra of irradiated ammonium hydrosulfide (NH4SH), a reported Jovian atmospheric cloud component, for a range of temperatures and radiation doses and make assignments to the spectral features. We show that the combination of radiolysis and thermal annealing of NH4SH causes the originally featureless ultraviolet-visible reflectance spectrum to evolve into one that absorbs in the ultraviolet-visible region. Furthermore, we find that our laboratory spectra resemble HST (Hubble Space Telescope) spectra below 500 nanometers, suggesting that the more stable reaction products of NH4SH radiolysis are likely an important component of the Great Red Spot.
Document ID
20160005835
Document Type
Reprint (Version printed in journal)
Authors
Loeffler, Mark J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Hudson, Reggie L. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Chanover, Nancy J. (New Mexico State Univ. Las Cruces, NM, United States)
Simon, Amy A. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
May 4, 2016
Publication Date
February 10, 2016
Publication Information
Publication: Icarus
Volume: 271
ISSN: 0019-1035
Subject Category
Astronomy
Lunar and Planetary Science and Exploration
Report/Patent Number
GSFC-E-DAA-TN31268
Funding Number(s)
CONTRACT_GRANT: NAS5-26555
Distribution Limits
Public
Copyright
Other
Keywords
Jupiter's Great Red Spot (GRS)
ammonium hydrosulfide
ion-irradiated ammonium hydrosulfide

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