Meridional Spreading of the SL-9 Debris as Imaged in the Ultraviolet with WFPC2

Details Meridional Spreading of the SL-9 Debris as Imaged in the Ultraviolet with WFPC2 Meridional Spreading of the SL-9 Debris as Imaged in the Ultraviolet with WFPC2

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.2240v&link_type=abstract

American Astronomical Society, DPS meeting #28, #22.40; Bulletin of the American Astronomical Society, Vol. 28, p.1149

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Jupiter's UV banded structure and dark polar hoods present difficulties for tracking the long term motions and fading of the SL-9 impact debris. A technique has been developed where a simulated Jupiter image is subtracted from Wide Field Planetary Camera 2 (WFPC2) images to enhance contrast of the time-dependant variations. The simulated Jupiter is generated from a mean latitudinal banding, a third-order Minnaert law limb darkening and the system's point spread function. This technique works well with the Jovian F255W, F218W and F160W images since they show primarily low contrast bands. A series of images, covering the two years after the impacts, is presented to display the meridional spreading and fading of the SL-9 debris. In the months following the impacts, the debris dispersed into a broad, nearly uniform band. The spreading cannot easily be determined in the F255W and F218W images from March 1995 as a result of the bands' natural contrast variations. A slight darkening at the impact latitude is present in F160W images from September 1995. Detecting the F160W darkening is easier since these bands are stable over this time. This work is supported by NASA grants GO 6141.04 and NAGW-1766 to the University of Michigan.

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