%0 Journal Article %T Why Do Black--Hole X-ray Binaries Tend to Be Transient? %A Jean-Pierre Lasota %J Physics %D 1999 %I arXiv %R 10.1007/10720995_27 %X Black hole X-ray binaries are transient probably because their discs are subject to the same thermal-viscous instability which is present in dwarf nova binary systems. I discuss applications of the dwarf-nova instability model to transient, low-mass, X-ray binary systems. When disc truncation and X-ray irradiation are taken into account this model is capable of reproducing the basic properties of X-ray binary outbursts (Dubus et al. 2000). %U http://arxiv.org/abs/astro-ph/9911143v1