Abstract
The unknown quantities ( a ) central stellar temperature, ( b ) energy yielded by nuclear transformations, ( c ) abundance of certain light elements available for specific transformations, are here related by assuming certain models and calculating what abundances would permit energy liberation equivalent to the excess luminosity of some pulsating and some erupting stars. Conditions of local transient temperature are discussed, under which models of certain mass and certain stages in exhaustion of hydrogen and other light elements, capable of liberating the required energy, might exhibit periodic or catastrophic relief from a rate of generation temporarily in excess of the corresponding steady star's luminosity. The models are related to a view of Cepheids as pulsating before reaching the Bethe maintenance and some types of Novae as erupting after again beginning to shrink subsequent to the Bethe stage.
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