Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...202..276h&link_type=abstract
Astrophysical Journal, vol. 202, Nov. 15, 1975, pt. 1, p. 276-282.
Astronomy and Astrophysics
Astrophysics
36
Emission Spectra, Fabry-Perot Spectrometers, Kohoutek Comet, Abundance, Ground Based Control, Hydrogen Atoms, Line Spectra, Particle Production, Perihelions
Scientific paper
Observations of H-alpha, H2O+, and forbidden O I emission lines from comet Kohoutek were made during a 2-month period around perihelion. Analyses of H-alpha line profiles and line intensities indicate that the mean outflow velocity of the hydrogen atoms was 7.8 (+ or - 0.2) km/sec and that the hydrogen atom production rate typically varied (0.4 to 1.4) times 10 to the 29-th power per sec for comet-sun distances between 1 AU and 0.4 AU, respectively. The identification of an H2O+ emission feature in certain H-alpha scans indicates that the H2O ions were moving in a tailward direction with a velocity of 20 to 40 km/sec with respect to the comet nucleus. An upper limit of 1 part in 100 was found for the D/H ratio in the cometary atomic hydrogen cloud.
Huppler D.
Reynolds Ron J.
Roesler Fred L.
Scherb Frank
Trauger John
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