A substantial fraction of cataclysmic variables (CVs) reveal nonsolar abundances. A comprehensive list of CVs that includes those that have been examined for these abundances is given. Three possible sources of these nonsolar abundances on the secondary are accretion during the red giant common envelope phase, an evolved main-sequence secondary, and nova-processed material. Use of the secondary’s cross section just on the escaping nova material to change the abundances of its convective region has been the killing objection for considering nova-processed material. The key element, ignored in other studies, is that a thermonuclear runaway on a white dwarf causes a strong propagating shock wave that not only ejects material but also produces a large amount of nonejected material that forms a common envelope. This nova-produced common envelope contains a large amount of nonsolar material. We demonstrate that the secondary has the capacity and time to reaccrete enough of this material to acquire a significant nonsolar convective region. This same envelope interacting with the binary will produce a frictional angular momentum loss, which can be the consequential angular momentum loss needed for the average CV white dwarf mass, the white dwarf mass accretion rates, the period minimum, the orbital period distribution, and the space density of CV problems. This interaction will decrease the orbital period, which can cause the recently observed sudden period decreases across nova eruptions. A simple, rapid evolutionary model of the secondary that includes the swept-up nova-produced material and the increasing convective region is developed and applied to individual CVs.

很大一部分灾难性变量 (CV) 显示了非太阳丰度。给出了一个完整的 CV 列表，其中包括那些已经检查过这些丰度的 CV。次级上这些非太阳丰度的三个可能来源是红巨星公共包层阶段的吸积、演化的主序次生和新星处理的物质。使用次级在逃逸的新星材料上的横截面来改变其对流区的丰度一直是考虑新星处理材料的主要反对意见。在其他研究中被忽略的关键因素是，白矮星上的热核失控会引起强烈的传播冲击波，不仅会喷射物质，还会产生大量未喷射的物质，形成一个共同的包层。这个由新星产生的通用外壳包含大量非太阳能材料。我们证明次级有能力和时间重新吸积足够的这种材料以获得重要的非太阳对流区。与双星相互作用的同一包络线将产生摩擦角动量损失，这可能是平均 CV 白矮星质量、白矮星质量吸积率、周期最小值、轨道周期分布和CV 问题的空间密度。这种相互作用将减少轨道周期，这可能导致最近观察到的新星爆发期间突然周期减少。一个简单的，