On the nature of the anti-tail of Comet Kohoutek /1973f/. II - Comparison of the working model with ground-based photographic observations

Details On the nature of the anti-tail of Comet Kohoutek /1973f/. II - Comparison of the working model with ground-based photographic observations On the nature of the anti-tail of Comet Kohoutek /1973f/. II - Comparison of the working model with ground-based photographic observations

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...27..135s&link_type=abstract

Icarus, vol. 27, Jan. 1976, p. 135-146.

Astronomy and Astrophysics

Astronomy

3

Astronomical Photometry, Comet Tails, Kohoutek Comet, Photointerpretation, Astronomical Models, Brightness Discrimination, Comet Nuclei, Cosmic Dust, Data Reduction, Photographic Recording, Reference Stars, Sky Brightness, Surface Properties

Scientific paper

On the basis of photographic observations made at the Cerro Tololo Inter-American Observatory, the radial and transverse brightness profiles and time variations in the surface brightness of the anti-tail of Comet Kohoutek were examined. In the process of photometric reduction one-dimensional radial tracings passing through the comet's nucleus and covering the entire anti-tail were used in the place of the standard two-dimensional scans. Each radial scan was defined by the position angle, and 'noise' variations were interpolated from the known field brightness outside the anti-tail. An analysis of the results provides quantitative support for a previously proposed model (Sekanina, 1974) suggesting that the dust particles in the anti-tail suffered a significant loss in radius due to evaporation near the perihelion passage. Preliminary calculations indicate that only particles initially larger than 100-150 micrometers in diameter survived. The emission rate of dust may be comparable to those derived for Comets Arend-Roland (1957 III) and Bennett (1970 II).

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