Concerning the Sub-Structure in the Heads of Comets with Type I and Type II Tails

Details Concerning the Sub-Structure in the Heads of Comets with Type I and Type II Tails Concerning the Sub-Structure in the Heads of Comets with Type I and Type II Tails

Mar 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ap%26ss..27..211w&link_type=abstract

Astrophysics and Space Science, Volume 27, Issue 1, pp.211-216

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

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.

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