Dust tail streamers of a comet with rotating nucleus

Details Dust tail streamers of a comet with rotating nucleus Dust tail streamers of a comet with rotating nucleus

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.191....1b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 191, no. 1, May 1992, p. 1-22.

Astronomy and Astrophysics

Astrophysics

6

Astronomical Models, Comet Nuclei, Comet Tails, Computerized Simulation, Cosmic Dust, Halley'S Comet, Rotating Bodies

Scientific paper

The paper presents synthetic images of the dust tail for a comet which has a rotating nucleus with one predominant dust source fixed to it. The images were generated using a new computer model which, unlike similar models, allows for the study of dust tails caused by a rotating nucleus with an anisotropic distribution of sources. The dust tail is studied in the postperihelion phase of a parabolic comet with a perihelion distance of 0.5 AU. In the case of a rotating nucleus with anisotropic emission characteristics, streamers caused solely by the dynamics of the dust particles form in the dust trail even if there is no dependence between the solar irradiation angle of the source and the amount of dust emitted. If the dust emission depends on the solar irradiation angle of the dust source, then the brightest tail regions do not necessarily coincide with the synchrones for the times of maximum dust emission. It is argued that a thorough analysis of streamer patterns in a cometary dust tail requires assumptions on the rotational state and the dust source distribution of the nucleus.

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