The substructure in the heads of comets with type I and type II tails |
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Authors: | Karl Wurm |
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Institution: | (1) Asiago Observatory, Italy |
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Abstract: | On a number of Comet Halley 1910 photographs of short exposures (Helwan material) a substructure in dust emission in the inner coma becomes detectable. Narrow and diffuse dust streamers leave the nucleus area within a smaller or larger cone opened in the direction to the Sun. On plates with longer exposures these structures merge together in a parabolic envelope. Structures of the type I tail are not visible for lower heliocentric distances (r<1) in the inner coma; however, occasionally CN, C2 eject circular emission areas.The present note represents a preliminary account of a larger publication which will contain a great number of details and also many photographic reproductions. The preparation of the latter will, however, take some time. |
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