Radio observations of Comet Bradfield /1979l/

Details Radio observations of Comet Bradfield /1979l/ Radio observations of Comet Bradfield /1979l/

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.

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