Other
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998dps....30.4404r&link_type=abstract
American Astronomical Society, DPS meeting #30, #44.04; Bulletin of the American Astronomical Society, Vol. 30, p.1100
Other
2
Scientific paper
Here we report the combination of new near-ir spectra (1.45-2.48 mu m), of Titania and Oberon obtained in September 1995 at a resolving power of 800, with older near-ir observations (0.5-1.44 mu m), and recent UV (0.22-0.48 mu m) observations obtained with HST. Previous interpretations suggest these surfaces are chiefly composed of water ice and varying amounts of spectrally neutral material. The new near-ir data provide the opportunity to search for absorption bands that could be attributable to surface materials other than water ice and because the combined spectra include such a broad wavelength region, to undertake improved models of water and neutral components on the surface. The calculated near-ir geometric albedos clearly exhibit three broad spectral features. Two (1.52- & 2.05 mu m) have previously been used to demonstrate the presence of water ice on these satellites. The third ( 1.65 mu m), suggests the presence of hexagonal water ice at low temperatures, and may provide a mechanism of estimating the surface temperature. There is no spectral evidence for ices of CO_2, CO, NH_3 or CH_4. At UV wavelengths there is a broad absorption near 0.27-0.28 mu m previously attributed to OH formed by magnetospheric-surface interactions and retained at the low surface temperatures of these satellites. Surface components used in a Hapke scattering models include values for a combination of irradiated water ice in the UV and hexagonal water ice at 100K in the near-ir (IW), amorphous carbon (AC), and tholins (T) (produced from gas and solid). Results of these models suggest the surfaces of Titania/Oberon are composed of IW ( 77/52 and finally T ( 4/7%).
Benedix Gretchen K.
Cruikshank Dale P.
de Bergh Catherine
Geballe Thomas Ronald
Khare Bishun N.
No associations
LandOfFree
Titania and Oberon: Surface Composition from New Near-infrared Observations and Reflectance Models 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 Titania and Oberon: Surface Composition from New Near-infrared Observations and Reflectance Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Titania and Oberon: Surface Composition from New Near-infrared Observations and Reflectance Models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-815809