Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..897s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 189, Dec. 1979, p. 897-906.
Astronomy and Astrophysics
Astronomy
21
Astronomical Photometry, Comet Tails, Emission Spectra, Radiant Flux Density, West Comet, Electrophotometry, Heliometers, Neutral Gases, Sodium, Spectral Bands
Scientific paper
Spectrum scans of the coma of Comet West (1975n) covering the range λλ3700--5700 Å were made on eight nights when the heliocentric distance of the comet varied from 0.588 to 0.853 AU. These have been used to derive the absolute flux in the CN(0,0), C3(4050), C2(1, 0) and C2(0, 0) bands as well as in the continuum. Enhancements in the band emissions were noticed on three nights in CN(0,0), C3(4050) and C2(1, 0). The column densities of neutral sodium atoms are derived from scans around 5900 Å on four nights. The column densities of CO+ ions corresponding to four prominent band sequences are evaluated from two scans of the tail.
Babu S. D. G.
Parthasarathy Mudumba
Sivaraman K. R.
Vainu Bappu M. K.
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