The 2-4 Millimeter-Wavelength Opacity of Ammonia: Extensive Laboratory Measurements and a New Model

Details The 2-4 Millimeter-Wavelength Opacity of Ammonia: Extensive Laboratory Measurements and a New Model The 2-4 Millimeter-Wavelength Opacity of Ammonia: Extensive Laboratory Measurements and a New Model

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.2801d&link_type=abstract

American Astronomical Society, DPS meeting #41, #28.01

Astronomy and Astrophysics

Astronomy

Scientific paper

Over 1000 laboratory measurements of the 2-4 millimeter-wavelength opacity of ammonia have been made under simulated Jovian atmospheric conditions using a high-precision laboratory system developed at Georgia Tech (Devaraj and Steffes, B.A.A.S., 40, 2008). These laboratory measurements of the opacity of ammonia were made of various gas mixtures of hydrogen ( 77.5-85.5%), helium ( 12.5-13.5%), and ammonia (1-10%) at pressures between 0.5 bar and 3 bars and temperatures between 200K and 300K. Laboratory measurements were also made of the opacity of pure ammonia at pressures between 50 mbar and 1 bar and temperatures between 200K and 300K. These measurements have given an insight into the behavior of the inversion, rotational and ╤ vibrational lines of ammonia in the millimeter-wave region. Furthermore, the 140 GHz ╤ line of ammonia which has thus far only been theoretically predicted (Shimizu, J. Chem. Phy., 51, 1969) has been measured in the laboratory. Using these measurements, a new model has been developed to accurately characterize the opacity of ammonia in the millimeter-wave region. These measurements and the model will help to better interpret the millimeter-wave emission spectrum of the Jovian planets and will also help predict the potential effects of the rotational lines on the centimeter-wave emission from the deepest levels of those atmospheres.
This work is supported by the NASA Planetary Atmospheres Program under Grant NNG06GF34G.

Affiliated with

Also associated with

No associations

Rating

The 2-4 Millimeter-Wavelength Opacity of Ammonia: Extensive Laboratory Measurements and a New Model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The 2-4 Millimeter-Wavelength Opacity of Ammonia: Extensive Laboratory Measurements and a New Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 2-4 Millimeter-Wavelength Opacity of Ammonia: Extensive Laboratory Measurements and a New Model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1332860