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The Near-Nuclear Coma of Comet Halley in March 1986
Fulle, Marco; Szegö, Karoly; Crifo, Jean-François +1 more
The cameras carried onboard the flyby missions to comet P/Halleyin 1986 imaged the near nuclear jet activity fromseveral spatial directions. The observed, very structured near nucleardust jets were considered at that timeas the result of dust emission from well localized active surface regions(without supporting 3-D model computations, however).Ba…
Influence of coronal mass ejection on geomagnetic activity during 1988–1993
Shrivastava, Pankaj Kumar; Singh, G. N.
The most rapid and dramatic evolution in the solar corona occurs in events now known as Coronal Mass Ejections (CMEs). There have considerable importance for our understanding of the evolution of the mass and energy injected into the interplanetary medium. In this work, we have studied the relation of CMEs with geomagnetic activity for the period …
The Shadow of Comet Hale-Bopp in Lyman-Alpha
Bertaux, Jean-Loup; Lallement, Rosine; Szegö, Karöly +1 more
For a few months around perihelion, the central part of the Hale-Bopp hydrogen cloud has been optically thick to the solar Lyα radiation, and has significantly reduced the solar flux available for the resonance glow of interstellar hydrogen beyond the comet. This shadowing effect on the interstellar gas is the first ever observed comet shadow. It …