On the outburst recurrence time for the accretion disk limit cycle mechanism in dwarf novae
On the outburst recurrence time for the accretion disk limit cycle mechanism in dwarf novae
复制标题
矮新星吸积盘极限环机制的爆发重现时间
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
J. Wheeler
中科院分区：
文献类型：
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作者：
J. Cannizzo;A. Shafter;J. Wheeler
本文试图从基础物理学的角度阐明矮新星爆发的时间尺度，并利用观测到的重复时间对模型加以限制。建立了一个简单的解析模型来描述极限环过程，并得到了喷发间隔的表达式。结果表明，在爆发期间，中心白矮星上的质量增加量很小，这可以用加热锋和冷却锋的传播来解释。推导了吸积盘质量分数对模型参数的依赖关系，并利用该结果构造了递归时间的半解析表达式。
An attempt is made here to elucidate the dwarf nova outburst time scale in terms of basic physics, and to place limits on the model by using the observed recurrence times. A simple analytical model is developed to describe the limit cycle process, and an expression is obtained for the interval between eruptions. It is shown that the smallness of the amount of mass accreted onto the central white dwarf during eruption can be explained in terms of the propagation of heating and cooling fronts. The dependency of the fraction of the disk mass accreted on the model parameters is derived, and the result is used to construct a semianalytic expression for the recurrence time.