Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept...11m&link_type=abstract
In NASA, Washington Reports of Planetary Astronomy, 1985 p 11-13 (SEE N87-12407 03-89)
Astronomy and Astrophysics
Astronomy
Cometary Atmospheres, Infrared Astronomy, Laser Spectrometers, Mars Atmosphere, Fourier Transformation, Halley'S Comet, Nonthermal Radiation, Spatial Resolution, Spectral Resolution, Thermal Emission, Trace Elements, Water Vapor
Scientific paper
The CO2 laser heterodyne spectrometer was used at the 3-m IRTF on Mauna Kea to make measurements of Mars during the 1984 opposition. Analysis of the observations of the mesospheric non-thermal emission demonstrated the existence of a warming of the Mars polar mesosphere, similar to the seasonal effects which are well known to occur at the Earth's mesopause. A search for CO2 and NH3 on Comet Halley was done with the new Kitt Peak system as well as with the IRTF heterodyne system. A Lamb-dip absorption cell was designed and constructed. Its use will allow extreme frequency stabilization of the laser local oscillator, which will greatly facilitate measurements of winds and dynamical phenomena. The Lamb-dip cell was used at Kitt Peak to study zonal and meridional winds in the atmosphere of Venus. Water vapor was detected in Comet Halley using Fourier transform spectrometer. The 2.65 micrometer upsilon3 band was seen in emission, confirming non-thermal-equilibrium excitation models for comets. A study was made of the variability of Jovian ethane emission. The average volume mixing ratio of ethane in the Jovian stratosphere was found to be 3x10 to the -6 power, with the greatest variability seen in the auroral regions.
Deming Drake
Espenak Fred
Kostiuk Theodor,
Mumma Michael J.
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