标题： 矮新星在低质量转移率时 显示英文标题

标题： Dwarf Novae at Low Mass Transfer Rates

摘要： 我们证明，如果在休眠的矮新星系统中，吸积盘的内部区域被磁场破坏或被虹吸流蒸发，那么剩余的盘在质量转移率 $\lta 10^{15}$ g s$^{-1}$ 下是全局稳定的。 这意味着这些系统中的（超）爆发必须由伴星增强的质量转移触发。 我们认为，WZ Sge缺乏正常爆发仅是因为其质量转移率较低，而其盘中的粘度不必比其他休眠的矮新星低几个数量级。 显示英文摘要

摘要： We show that if the inner regions of accretion discs in quiescent dwarf nova systems are removed by magnetic disruption or evaporated by siphon flows, the remaining disc is globally stable for mass transfer rates $\lta 10^{15}$ g s$^{-1}$. This implies that (super)outbursts in these systems have to be triggered by an enhanced mass transfer form the companion. We suggest that the lack of normal outbursts in WZ Sge results only from its low mass transfer rate and that the viscosity in its disc does not have to be few orders of magnitude lower than in other quiescent dwarf novae.