Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246l..63e&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 1, June 1991, p. L63-L66.
Astronomy and Astrophysics
Astronomy
22
Atmospheric Composition, Atmospheric Moisture, Heavy Water, Radio Spectra, Venus Atmosphere, Absorption Spectra, Line Spectra, Radio Astronomy, Vertical Distribution, Water
Scientific paper
The 225.9 GHz line of HDO has been detected in absorption in the atmosphere of Venus, with the 30-m IRAM antenna. This measurement gives information regarding the vertical distributions of HDO, and thus H2O, in this planet. The observations are consistent with an H2O vertical distribution strongly depleted by saturation at an altitude of 95 km, and, assuming a D/H enrichment of 120 with respect to the terrestrial value, with a mixing ratio of 3.5 (+ or - 2.0) ppm in the range 65-95 km.
Encrenaz Th.
Gulkis Sam
Lellouch Emmanuel
Paubert Gabriel
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