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stellar interiors

International Astronomical Union Colloquium (1)

International Astronomical Union (1)

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Coulomb Corrections and Globular Cluster Stellar Evolution
Charles R. Proffitt
Journal:

International Astronomical Union Colloquium / Volume 137 / 1993

Published online by Cambridge University Press:

12 April 2016, pp. 451-453

Print publication:

1993
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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.