Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....7372b&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #7372
Physics
Scientific paper
We present far-infrared spectra of the Saturn system that were measured with the Long Wavelength Spectrometer (LWS) aboard the Infrared Space Observatory between 43 and 197 μm. The spectra were taken at medium (about 150 to 200) spectral resolving power and with a beam size of some 80" (full width at half maximum). These observations cover the period between 14 Dec 1995 and 14 Dec 1997, corresponding to inclination angles of the ring system as seen from Earth of i = +2.4o and i = -11.6o, respectively. We found that at wavelengths between 43 and 100 μm the overall emission of Saturn and its ring increases with mid i mid, whereas at longer wavelengths this relationship is inverted or not existent. Extrapolating to i = 0o we could remove Saturn's contribution to our observations and obtain the far infrared spectrum of the ring system only. We discuss some basic parameters of the ring that could be derived from these measurements in an hitherto unexplored wavelength region, like temperature, emissivity etc., and describe their dependence on wavelength.
Burgdorf Martin
Davis Gary
Orton Glenn
Sidher Sunil
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