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Formation of eccentric disks around black holes
Hadrava, Petr ; Řezáč, R. ; Oestgaard, E.
The formation and evolution of eccentric disks around black holes due to explosion of a companion on an eccetric orbit is modeled by means of exact general-relativistic N-particle treatment. It is shown that in spite of the generally accepted view that the debris must be quickly smeared out to a circular accretion disk.
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Solar activity impulses
Bumba, Václav ; Klvaňa, Miroslav ; Garcia, A.
We study the sums of sunspot areas separately for the norhtern and southern hemisphere for each day during the four low activity cycles. During certain time intervals, the solar activity is characterized by isolated, suddenly appearing increases, on one, or simultaneously on both hemispheres.
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