Hydrogen production rates from ground-based Fabry-Perot observations of comet Kohoutek

Details Hydrogen production rates from ground-based Fabry-Perot observations of comet Kohoutek Hydrogen production rates from ground-based Fabry-Perot observations of comet Kohoutek

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..644s&link_type=abstract

Astrophysical Journal, Part 1, vol. 243, Jan. 15, 1981, p. 644-650.

Astronomy and Astrophysics

Astrophysics

51

Fabry-Perot Spectrometers, H Alpha Line, Hydrogen Production, Kohoutek Comet, Balmer Series, Lyman Alpha Radiation, Comets, Kohoutek Comet, Observations, Hydrogen, Production Rate, Models, Emissions, Spectrometry, Lyman-Alpha Radiation, Calibrations, Comparisons, Intensity, Analysis, Data, Distance

Scientific paper

The only ground-based observations of a cometary hydrogen corona that have been obtained up to the present were carried out during the appearance of comet Kohoutek (1973 XII). Hydrogen Balmer alpha (H-alpha) emission from the gas cloud surrounding the comet was detected using a Fabry-Perot spectrometer at Kitt Peak National Observatory. These observations have been reexamined using (1) recently obtained solar full-disk Lyman beta emission line profiles, (2) a new calibration of the absolute sensitivity of the Fabry-Perot spectrometer based on comparison of NGC 7000 with standard stars and the planetary nebula NGC 7662, and (3) corrections for atmospheric extinction instead of the geocoronal H-alpha comparison method used previously to obtain comet H-alpha intensities. The new values for hydrogen production rates are in good agreement with results obtained from Lyman alpha observations of comet Kohoutek.

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