Abstract
view Abstract Citations (5) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Radio observation of comet Meier /1978f/ in 18-cm OH lines Giguere, P. T. ; Huebner, W. F. ; Bania, T. M. Abstract Observations of 18-cm OH spectral lines in comet Meier (1978f) with the 1000-ft. Arecibo telescope show spatial resolution of the OH coma by the 2.9 arcmin beam (=3.7 x 10 to the 5th km). The data agree with predictions of the solar Fraunhofer spectrum-pumping theory of comet OH excitation. On the assumption that the OH parent molecule (e.g., H2O) has a Haser-model scale length of about 1.0 x 10 to the 5th km at heliocentric distance 1 AU, an OH scale length of less than 10 to the 6th km, and probably near 1.0 x 10 to the 5th km is derived. Assuming a recently calculated value of the OH lifetime and the solar radiative pumping model, the results indicate an OH production rate of 10 to the 29th Kayser at heliocentric distance 2 AU. Publication: The Astronomical Journal Pub Date: September 1980 DOI: 10.1086/112797 Bibcode: 1980AJ.....85.1276G Keywords: Comets; Hydroxyl Emission; Line Spectra; Molecular Excitation; Radio Astronomy; Abundance; Astronomical Spectroscopy; Circular Polarization; Hydroxyl Radicals; Ion Production Rates; Normal Density Functions; Radial Velocity; Radiant Flux Density; COMETS; MEIER COMET; RADIO ASTRONOMY; OBSERVATIONS; SPECTRUM; COMAE; MODELS; DATA; PROCEDURE; PRODUCTION RATE; HYDROXYL ION; EMISSIONS; COMPARISONS; DENSITY; ULTRAVIOLET; FLUX; ANALYSIS; WATER; Astronomy; Comets full text sources ADS |
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