First results of ISO-SWS observations of Jupiter

T. Encrenaz, T. de Graauw, S. Schaeidt, E. Lellouch, H. Feuchtgruber, D. A. Beintema, B. Bezard, P. Drossart, M. Griffin, A. Heras, M. Kessler, K. Leech, P. Morris, P. R. Roelfsema, M. Roos-Serote, A. Salama, B. Vandenbussche, E. A. Valentijn, G. R. Davis, D. A. Naylor

Research output: Contribution to journalArticleAcademicpeer-review

72 Citations (Scopus)

Abstract

The spectrum of Jupiter has been recorded between 2.75 and 14.5 mu m with the grating mode of the Short-Wavelength Spectrometer (SWS) of ISO. The resolving power is 1500. The main preliminary results of this observation are (1) at 3 mu 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 CH4-nu(3) band at 3.3 mu 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-Perot (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).

Original languageEnglish
Pages (from-to)L397-L400
Number of pages4
JournalAstronomy & astrophysics
Volume315
Issue number2
Publication statusPublished - Nov-1996

Keywords

  • planets
  • Jupiter
  • infrared, solar system
  • NORTH EQUATORIAL BELT
  • GAS-COMPOSITION
  • SPECTRA
  • RATIO

Cite this