Efficiency of Convection in Variable Stars and the Sun

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Science  08 Jun 1979:
Vol. 204, Issue 4397, pp. 1078-1079
DOI: 10.1126/science.204.4397.1078


Observed changes in the pulsation periods of Cepheid variables can be used to place an upper limit on changes in convective efficiency in their outer layers. This limit implies changes no larger than those recently suggested as occurring in the sun.