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CaseA evolution of massive close binary systems
Authors:Masaomi Nakamura  Yasuhisa Nakamura
Institution:(1) Astronomical Institute, Tohoku University, Sendai, Miyagi, Japan;(2) Komaba High School, Ohashi, Meguro-ku, Tokyo, Japan
Abstract:The caseA evolution of close binary systems with total mass of 20.4M odot is investigated by following the evolution of both components simultaneously. The evolution is followed up to the stage at which a system overflows the outer critical surface or evolves into the phase of modeBr mass-transfer. It is found that the evolution of the systems can be classified into six types. The ranges of initial parameters which lead systems to each type of evolution are shown on the initial-parameter plane. The evolutionary features of each evolution type are described in detail.
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