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A Lower Limit on the Age of the Universe
Brian Chaboyer, Peter J. Kernan, Lawrence M. Krauss +1
We report the results of a detailed numerical study designed to estimate both the absolute age and the uncertainty in age (with confidence limits) of the oldest globular clusters.…
Globular Cluster Ages and the Formation of the Galactic Halo
Brian Chaboyer, P. Demarque, Ata Sarajedini
Main sequence turnoff magnitudes from the recent set of Yale isochrones (Chaboyer \ea 1995) have been combined with a variety of relations for the absolute magnitude of RR Lyr star…
Halo Star Evolution
Brian Chaboyer
In this review, I will discuss a few problems which point to the need for improved stellar evolution models of halo stars. Current stellar evolution models do not match the observe…
The OPAL Equation of State and Low Metallicity Isochrones
Brian Chaboyer, Yong --Cheol Kim
The Yale stellar evolution code has been modified to use the OPAL equation of state tables (Rogers 1994). Stellar models and isochrones were constructed for low metallicity systems…
ROTATION, DIFFUSION, AND OVERSHOOT IN THE SUN: EFFECTS ON THE OSCILLATION FREQUENCIES AND THE NEUTRINO FLUX
Brian Chaboyer, P. Demarque, D. B. Guenther +1
We have studied the importance of the combined effects of rotation, diffusion, and convective overshoot on the p-mode oscillation spectrum and the neutrino flux of the standard sol…