Physics – Optics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.2409n&link_type=abstract
American Astronomical Society, DPS meeting #40, #24.09; Bulletin of the American Astronomical Society, Vol. 40, p.431
Physics
Optics
Scientific paper
During the Earth's crossing of the uranian ring plane in August 2007, over a period of 3 days, we obtained a series of near-infrared images of the planet and its ring system using the Hale 5-meter telescope at Palomar Observatory, California. Our observations were made using the Palomar Adaptive Optics system and PHARO infrared camera, alternating between H (1.65 microns) and K_short (2.10 microns) filters. The planet itself served as a reference target for the AO system. Images of the 5 principal uranian satellites were used, along with an accurate ephemeris, to determine the position of Uranus in each image. In addition to the main rings, dominated in this edge-on viewing geometry by the optically-thin eta and zeta rings, our best images also show the recently-discovered outer rings (mu and nu) as well as several of the smaller satellites discovered by Voyager in 1986. We will present stacked images of the rings and radial brightness profiles, comparing our results with those obtained with HST/WFPC2 by Showalter et al. (2008) and the Keck AO system by de Pater et al. (2008).
French Richard G.
Matthews Keith
Nicholson Philip D.
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