Computer Science
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010icar..210..270g&link_type=abstract
Icarus, Volume 210, Issue 1, p. 270-283.
Computer Science
Scientific paper
This study reports the analysis of far ultraviolet (FUV) limb spectra of the airglow of Saturn in the 1150-1850 Å spectral window, obtained with the Ultraviolet Imaging Spectrograph (UVIS) onboard Cassini, spanning altitudes from -1200 to 4000 km. The FUV limb emission consists of three main contributions: (1) H Ly-α peaking at 1100 km with a brightness of 0.8 kilo-Rayleighs (kR), (2) reflected sunlight longward of 1550 Å which maximizes at -950 km with 16.5 kR and (3) H2 bands in the 1150-1650 Å bandwidth, peaking at 1050 km reaching a maximum of 3.9 kR. A vertical profile of the local H2 volume emission rate has been derived using the hydrocarbon density profiles from a model of the Saturn equatorial atmosphere. It is well matched by a Chapman function, characterized by a maximum value of 3.5 photons cm-3 s-1 in the 800-1650 Å UV bandwidth, peaking at 1020 km. Comparisons between the observed spectra and a first-order synthetic airglow H2 model in the 1150-1650 Å bandwidth show that the spectral shape of the H2 bands is accounted for by solar fluorescence and photoelectron excitation. The best fits are obtained with a combination of H2 fluorescence lines and 20 eV electron impact spectra, the latter contributing ˜68% of the total H2 airglow emission.
Esposito Larry
Gérard Jean-Claude
Gustin Jacques
Stewart Ian
No associations
LandOfFree
Characteristics of Saturn’s FUV airglow from limb-viewing spectra obtained with Cassini-UVIS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Characteristics of Saturn’s FUV airglow from limb-viewing spectra obtained with Cassini-UVIS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Characteristics of Saturn’s FUV airglow from limb-viewing spectra obtained with Cassini-UVIS will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1487728