Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...371..776h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 20, 1991, p. 776-784.
Astronomy and Astrophysics
Astronomy
Cosmic Dust, Halley'S Comet, Interstellar Gas, Astronomical Photometry, Error Analysis, Iron, Perihelions, Quantitative Analysis, Comets, Halley, Gases, Dust, Production Rate, 1910Ii, Spectrometry, Earth-Based Observations, Analysis, Data Reduction, Photometry, Flux, Abundance, Procedure, Distance, Comparisons, Scattering, Geometry, Astronomy
Scientific paper
Selected long-slit spectrograms of Comet P/Halley, photographed during the postperihelion period between April 16 and June 3, 1910 have been quantitatively analyzed for comparison with the 1985/86 apparition. The Fe-V-Na spark spectrum was used to determine characteristic curves for these plates, and flux calibrations based on contemporaneous broad-band photometric measurements were applied. Haser model production rates for C2 and values Afp were computed for each of the nights selected and compared with the photometric observations obtained by Schleicher et al. (1987) during the comparable postperihelion period of the 1985/86 apparition. As found for the 1985/86 apparation, the gas and dust production in 1910 varied in phase, but the rates of production were higher than observed in 1986 by a small but statistically significant amount.
Howell Ellen S.
Lutz Barry L.
SLIPHER V. M.
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