Theoretical Uncertainties in Red Giant Branch Evolution: The Red Giant Branch Bump

  title={Theoretical Uncertainties in Red Giant Branch Evolution: The Red Giant Branch Bump},
  author={Stephanie R. Bjork and Brian Chaboyer},
  journal={The Astrophysical Journal},
A Monte Carlo simulation exploring uncertainties in standard stellar evolution theory on the red giant branch of metal-poor globular clusters has been conducted. Confidence limits are derived on the absolute V-band magnitude of the bump in the red giant branch luminosity function (MV,b) and the excess number of stars in the bump, Rb. The analysis takes into account uncertainties in the primordial helium abundance, abundance of ?-capture elements, radiative and conductive opacities, nuclear… 

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