Hydrogen production rate from comet Austin 1982g

Details Hydrogen production rate from comet Austin 1982g Hydrogen production rate from comet Austin 1982g

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..453s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 1, 1984, p. 453-459.

Astronomy and Astrophysics

Astrophysics

3

Comets, Emission Spectra, H Alpha Line, Hydrogen Clouds, Balmer Series, Cosmochemistry, Ion Production Rates, Lyman Spectra, Solar Wind, Velocity Distribution, Comets, Austin 1982G, Hydrogen, Production Rate, Earth-Based Observations, Emissions, Coronae, Spectrometry, Analysis, Intensity, Models, Velocity

Scientific paper

Meaningful measurements with respect to the cometary Balmer-alpha (H-alpha) emission are difficult and require the use of special equipment. The first ground-based observations of H-alpha emission from a cometary hydrogen corona were conducted on comet Kohoutek 1973 XII with a large-aperture Fabry-Perot spectrometer installed at the McMath solar telescope at Kitt Peak National Observatory. The present investigation is concerned with the second ground-based observations of cometary H-alpha emission carried out during the apparition of comet Austin 1982g. A 150 mm dual-etalon Fabry-Perot spectrometer was employed in the experiment. Use was made of an observatory which is designed for the high spectral resolution study of faint extended sources such as interstellar and geocoronal emission lines. The investigation demonstrates that hydrogen production rates from comets as faint as about 7th magnitude can be routinely measured from the ground at minimal cost.

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