Four micron high-resolution spectra of Jupiter in the North Equatorial Belt: H3(+) emissions and the C-12/C-13 ratio

Details Four micron high-resolution spectra of Jupiter in the North Equatorial Belt: H3(+) emissions and the C-12/C-13 ratio Four micron high-resolution spectra of Jupiter in the North Equatorial Belt: H3(+) emissions and the C-12/C-13 ratio

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994p%26ss...42..391m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 42, no. 5, p. 391-399

Astronomy and Astrophysics

Astronomy

24

Absorption Spectra, Atmospheric Composition, Atmospheric Models, Carbon 12, Carbon 13, Emission Spectra, Hydronium Ions, Infrared Astronomy, Infrared Spectra, Infrared Windows, Jupiter (Planet), Jupiter Atmosphere, Line Spectra, Ratios, Ammonia, Astronomical Spectroscopy, Infrared Spectroscopy, Infrared Telescopes, Methane, Space Infrared Telescope Facility

Scientific paper

Spectra of the North Equatorial Belt of Jupiter were obtained in March 1992 at an unapodized resolution of 0.1/cm between 2450 and 2600/cm with the Fourier Transform Spectrometer at the 3.6 m Canada-France-Hawaii Telescope (CFHT) on Mauna Kea. Several emissions from the nu2 band of H3(+) were detected. The excitation temperature derived from the relative intensities of these emissions averaged over a wide range of longitudes is 800 +/- 100 K, and the H3(+) column density is 1.56+1.0-0.5 x 1011/sq. cm. In addition, several strong absorption features due to (13)CH4 were observed. A comparison between (12)CH4 and (13)CH4 absorptions allowed us to obtain a new measurement of the C-12/C-13 ratio. We found that this ratio, estimated for the first time in this spectral range, is 89 (+/- 25), in agreement with the terrestrial value.

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