Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..355h&link_type=abstract
Astrophysical Journal, Part 1, vol. 244, Feb. 15, 1981, p. 355-357.
Astronomy and Astrophysics
Astronomy
6
Comets, Radio Astronomy, Radio Spectroscopy, Emission Spectra, Hydroxyl Emission, Line Spectra, Radio Spectra, Comets, Bradfield Comet, Radio Astronomy, Observations, Water, Data, Production Rate, Ultraviolet, Wavelengths, Emissions, Equipment, Models, Molecules
Scientific paper
A radio search was conducted for the F = 1-1 and F = 1-0 components of OH in the 2Π1/2, J = 1/2 state; H111α; the 101-111 transition of H2CO; the 211-212 E-state transition of HCOOCH3; the 616-523 transition of H2 O;the 3,3-3,3 transition of NH3 and U8.18883. No spectral lines were detected. Our derived upper limit to the H2O production rate, ˜7.4 × 1030 molecules s-1, is much larger than the rate inferred from observations of OH ultraviolet bands in this comet. This suggests that future searches for neutral water emission from comets should emphasize the 313-320 transition at 183.3 GHz, which must be observed from above all or most of the terrestrial atmosphere.
Brandt Jack C.
Feldman Paul D.
Hobbs Richard W.
Hollis Jan. M.
Maran Stephen P.
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