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ICARUS91, 220--233(1991) Possible Microwave Absorption by H2S Gas in Uranus' and
 

Summary: ICARUS91, 220--233(1991)
Possible Microwave Absorption by H2S Gas in Uranus' and
Neptune's Atmospheres
IMKE DE PATER
Astronomy Department, 601 Campbell Hall, University of California, Berkeley, California 94720
PAUL N. ROMANI
Science Systems and Applications, Inc., 7275 Executive Place, Suite 300, Seabrook, Maryland 20706
AND
SUSHIL K. ATREYA
Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109
ReceivedMay25, 1990;revisedFebruary12, 1991
We present new VLA observations of Neptune at 3.55 and 20.1
cm. The disk-averaged brightness temperatures are 191.2 - 6 K
at 3.55 cm, and 276.4 -+ 10 K at 20.1 cm. These values are
consistent with thermal spectra of the planet. We further present
a comparison between Uranus and Neptune's spectrum, using
improved atmospheric models for both planets. We improved the
old models by including microwave absorption by H2S. The rota-
tional lines 0fthis gas, which are all at (sub)millimeter wavelengths,
are pressure broadened to such an extent that considerable opacity

  

Source: Atreya, Sushil - Department of Atmospheric, Oceanic and Space Science, University of Michigan

 

Collections: Physics