Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...172..335w&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 172, no. 1-2, Jan. 1987, p. 335-341.
Astronomy and Astrophysics
Astronomy
12
Cometary Atmospheres, Halley'S Comet, Hydrocyanic Acid, Millimeter Waves, Radio Astronomy, Beam Switching, Radial Velocity, Spectral Line Width, Thermodynamic Equilibrium, Comets, Halley, Hydrogen Cyanide, Compostion, Comae, Telescope Methods, Earth-Based Observations, Production Rate, Intensity, Radio Methods, Spectra, Spectrometry, Parameters, Data, Jetting, Analysis, Molecules
Scientific paper
An account is given of the millimeter observations of comet Halley at the Onsala Space Observatory during November and December 1985. The J = 1-0 line of HCN at 88.63 GHz was detected in the comet's coma during the period Nov. 8-29, 1985, using the 20-m millimeter wave telescope. The line intensity varied by a factor of 2.2 or more during the observing period. The lines detected were of the F = 2-1 and F = 1-1 hyperfine transitions. On November 9, 10 and again on November 12, 13, weak evidence was seen for a velocity shift in both the main line and the F = 1-1 satellite line. The lines were redshifted by 0.9 km/s relative to the velocity of the comet and were narrower (0./4 km/s) than other detected lines. This may point to anisotropic gas ejection from the comet.
Ekelund A.
Ekelund L.
Winnberg Anders
No associations
LandOfFree
Detection of HCN in comet P/Halley 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 Detection of HCN in comet P/Halley, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of HCN in comet P/Halley will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1621532