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Photoelectric photometry of comets in the system of standard IHW filters and the special case of comet P/Halley
Author(s) -
Stecklum B.,
Pfau W.,
Hesse M.
Publication year - 1987
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113080404
Subject(s) - comet , halley's comet , physics , photometry (optics) , coma (optics) , astrophysics , meteoroid , photoelectric effect , astronomy , astrobiology , optics , stars
Magnitudes of comets P/Giacobini‐Zinner (1984e), P/Halley (1982i), P/Hartley‐Good (1985 1), and Thiele (1985 m) in the bandpasses of the standard IHW comet filters are presented. For comet P/Halley production rates for CN, C 3 , C 2 , and solids were derived. For the gaseous components these show a strong dependence on heliocentric distance. The dependence is less steep for the solids which may be due to relatively pronounced backscattering properties in case of comet P/Halley. During one night (1985 Dec. 22/23) intensity profiles along three sections through the coma of comet P/Halley were measured. Compared with theoretical profiles they show a global anisotropy of the coma and possibly local structure.