A Bayesian Analysis of the Ages of Four Open Clusters
Abstract
In this paper we apply a Bayesian technique to determine the best fit of stellar evolution models to find the main sequence turn off age and other cluster parameters of four intermediate-age open clusters: NGC 2360, NGC 2477, NGC 2660, and NGC 3960. Our algorithm utilizes a Markov chain Monte Carlo technique to fit these various parameters, objectively finding the best-fit isochrone for each cluster. The result is a high-precision isochrone fit. We compare these results with the those of traditional "by-eye" isochrone fitting methods. By applying this Bayesian technique to NGC 2360, NGC 2477, NGC 2660, and NGC 3960, we determine the ages of these clusters to be 1.35 +/- 0.05, 1.02 +/- 0.02, 1.64 +/- 0.04, and 0.860 +/- 0.04 Gyr, respectively. The results of this paper continue our effort to determine cluster ages to higher precision than that offered by these traditional methods of isochrone fitting.
Keywords
Cite
@article{arxiv.1611.00835,
title = {A Bayesian Analysis of the Ages of Four Open Clusters},
author = {Elizabeth J. Jeffery and Ted von Hippel and David A. van Dyk and David C. Stenning and Elliot Robinson and Nathan Stein and W. H. Jefferys},
journal= {arXiv preprint arXiv:1611.00835},
year = {2016}
}
Comments
13 pages, 8 figures, published in ApJ