Comprehensive Jupiter Ammonia Map

Details Comprehensive Jupiter Ammonia Map Comprehensive Jupiter Ammonia Map

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.1111w&link_type=abstract

American Astronomical Society, DPS meeting #38, #11.11; Bulletin of the American Astronomical Society, Vol. 38, p.497

Astronomy and Astrophysics

Astronomy

Scientific paper

In March 2005, we collected a multi-wavelength set of Jupiter images, with the goal of understanding the horizontal and vertical distributions of ammonia gas and aerosols at pressures less than about 3 bar. HST/NICMOS images in five filters from 1.87 µm to 2.12 µm show the low-latitude spatial distribution of aerosol opacity, at altitudes corresponding to both the upper tropospheric haze as well as the deeper ammonia and/or ammonium hydrosulfide clouds. Both the 1.66 µm and 2.04 µm filters have similar continuum absorption, but since ammonia absorption is stronger at 2.04 µm, we use a ratio of images taken with these filters to show variations in the concentration of ammonia gas at the level of the upper tropospheric haze. We also infer the ammonia gas concentration using longitude-resolved VLA maps of Jupiter's thermal emission, at pressure levels corresponding to the ammonia cloud (2 cm) and ammonium hydrosulfide cloud (3.6 cm). IRTF images at 5 µm provide additional information about the opacity of the ammonium hydrosulfide cloud. Although quantitative modeling of the integrated dataset is still in progress, we will discuss the possibility that the upper tropospheric haze is fed by the ammonia cloud.

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