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The Comet Halley Dust and Gas Environment
Keller, H. U.; Gombosi, T. I.; Sekanina, Z. +8 more
Quantitative descriptions of environments near the nucleus of comet P/Halley have been developed to support spacecraft and mission design for the flyby encounters in March, 1986. To summarize these models as they exist just before the encounters, we review the relevant data from prior Halley apparitions and from recent cometary research. Orbital e…
Semidetached Systems - Evolutionary Viewpoints and Observational Constraints
De Greve, J. P.
The present knowledge on the evolution of semidetached systems is reviewed. Characteristics of observed systems are discussed and general properties tested by the behaviour of theoretical models. New models of mass accreting companion stars are computed. The accretion phase is divided into a fast and slow phase with an accretion rate depending on …