Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept...96i&link_type=abstract
In NASA, Washington Reports of Planetary Astronomy, 1985 p 96-97 (SEE N87-12407 03-89)
Astronomy and Astrophysics
Astronomy
Cometary Atmospheres, Halley'S Comet, Planetary Atmospheres, Radio Waves, Stellar Spectrophotometry, Giacobini-Zinner Comet, Hydroxides, Line Spectra, Stellar Occultation, Very Large Array (Vla)
Scientific paper
The research effort was concentrated toward comet P/Halley, although observations of other comets including Giacobini-Zinner, Hartley-Good and Thiele were made as opportunities arise. In preparing for the apparition of P/Halley, detailed predictions for the emission in the 18 cm OH transitions were made in order to assist observers and to indicate what type of data would be particularly valuable. Likewise, since occultations by the comet of background radio sources can provide unique types of information, the tracks of P/Halley and P/Giacobini-Zinner were surveyed with the NRAO Very Large Array, background sources were mapped, and a catalogue of occulted sources published. Beginning in September, 1985, regular observations of the 18 cm OH lines have been made for P/Halley using the 43 m antenna of the NRAO in Greenbank, West Virginia. These data promise to provide the most accurate time sequence for the OH emission for any comet ever obtained at radio wavelengths. From the linewidth and shape, information is obtained on the kinetics of the gas in the cometary coma. An extensive series of observations have been undertaken with 14 m antenna to study emission from the HCN molecule in P/Halley. These data provide the first definitive detection of this component of the cometary ices. Interesting variations in the production of HCN were observed with time scales less than a day. Likewise, there appeared to be variations in the ratio of the hyperfine components of the J = 1-0 transition.
Irvine William M.
Schloerb Peter F.
No associations
LandOfFree
Radiative transfer in planetary atmospheres 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 Radiative transfer in planetary atmospheres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiative transfer in planetary atmospheres will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1658187