Other
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.3105y&link_type=abstract
American Astronomical Society, DPS meeting #38, #31.05; Bulletin of the American Astronomical Society, Vol. 38, p.542
Other
1
Scientific paper
We observed Pluto occult a 15th magnitude star from the AAT and five other sites in Australia and New Zealand. The high-quality lightcurve from the AAT allows us to study the vertical structure of Pluto's atmosphere. The lightcurve deviates from that produced by a clear, isothermal atmosphere, as also seen in 1988 and 2002, indicating a haze layer or a thermal gradient, with the deviation in the AAT lightcurve (sometimes called "the kink") appearing when the stellar flux was about one fifth its unocculted value.
We can use the AAT lightcurve to derive net heating rates balancing thermal conduction under the assumption of a clear atmosphere. The derived heating rates will be compared with radiative heating and cooling by methane and carbon monoxide, for various assumptions of their vertical mixing ratio profiles.
This work was supported by grants from NSF Major Research Instrumentation and NASA Planetary Atmospheres.
Buie Marc
French Richard
Olkin Cathy
Regester J.
Ruhland Christine
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