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Coulomb Corrections and Globular Cluster Stellar Evolution

Published online by Cambridge University Press:  12 April 2016

Charles R. Proffitt
Charles R. Proffitt*
Affiliation:
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218

Abstract

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The effects of Coulomb corrections on the evolution of globular clusters stars are discussed. Coulomb corrections alter the equation of state by about 1% in most of the stellar interior, and for stars of fixed initial parameters, this results in an 8% increase in the ZAMS luminosity and an 8% decrease in the age at the main sequence turnoff. Ages for globular clusters measured by comparing to the turnoff luminosity of theoretical isochrones are lowered by ≈ 4% when Coulomb effects are included.

Keywords

stellar interiorsglobular clustersequation of state
Type
V. The changing interior
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 451 - 453
Copyright
Copyright © Astronomical Society of the Pacific 1993

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