Saturn's Atmospheric Structure from Visible and Near-IR Observations

Details Saturn's Atmospheric Structure from Visible and Near-IR Observations Saturn's Atmospheric Structure from Visible and Near-IR Observations

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dps....31.5111c&link_type=abstract

American Astronomical Society, DPS meeting #31, #51.11

Astronomy and Astrophysics

Astronomy

Scientific paper

The vertical structure of Saturn's atmosphere is determined using an adding-doubling code to model observed center-to-limb brightness variations. The imaging data sets consist of a) Hubble Space Telescope WF/PC and WFPC2 images taken in continuum and narrow-band methane absorption filters, and b) near-IR (1--2.5 mu m) ground-based images taken in narrow-band methane and continuum filters with the Apache Point Observatory 3.5 meter telescope. A standard two-cloud model is employed, in which layers of clear gas interleave a stratospheric haze layer, an ammonia cloud deck, and a lower, semi-infinite cloud deck. Our code, which has heretofore been used to characterize the Jovian atmosphere, has been modified to incorporate physical conditions more appropriate for Saturn. The global, longitudinally-averaged atmospheric structure as a function of latitude is discussed; vertical structure in anomalous convective regions will be presented elsewhere. This work was funded by NASA Grant NAG5-7904. Additional support was provided by NASA through grant number AR-08363.01-97A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.

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