激变双星的角动量损失机制和演化

The Evolution and Angular Momentum Loss of Cataclysmic Binaries

本文详细研究了激变双星系统的演化，发现磁制动机制导致的角动量损失要求星风的量级为１０￣（－１１）－１０￣（－１２）Ｍ＿⊙ｙｒ￣－１，这比太阳风强１０￣２－１０￣３倍，表明磁星风机制失效，作者认为驱动双星系统演化的角动量损失是由来自致密星的吸积盘外边缘物质溢出的惯性离心力所致。

The detailed evolution of cataclysmic binaries is studied. For angular momentum loss associated with magnetic braking, it is found that about 10￣(─11)─10￣(─12)M_⊙yr￣─1 levels of stellar wind would be required, this wind is as large as 10￣2─10￣3 times stronger than solar wind, so we think here magnetic stellar wind is insufficient. It is well known there are mass outflows in cataclysmic binaries, we think that these outflows are centrifugally driven winds from the outer edge of the accretion disks.The winds extract angular momentum from these systems and therefore become a main cause for their secular evolution.