ASTRONOMY AND ASTROPHYSICS First results of ISO - SWS observations of Jupiter ?
نویسندگان
چکیده
The spectrum of Jupiter has been recorded between 2.75 and 14.5 m with the grating mode of the ShortWavelength Spectrometer (SWS) of ISO. The resolving power is 1500. The main preliminary results of this observation are (1) at 3 m, the first spectroscopic signature, probably associated with NH3 ice, of the Jovian cloud at 0.5 bar and (2) the first detection of a thermal emission at the center of the CH43 band at 3.3 m, showing evidence for a high temperature in the upper jovian stratosphere (T=800 K at P=0.16 microbar). In addition, the R(2) HD line has been detected for the first time in Jupiter, using the Fabry-Pérot (FP) mode of the SWS, with a resolving power of 31000. A preliminary analysis of the HD line indicates a D/H ratio of about 2.2 10 5.
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