SIMBAD references

2017MNRAS.468.1038W - Mon. Not. R. Astron. Soc., 468, 1038-1055 (2017/June-2)

The ACS survey of Galactic globular clusters - XIV. Bayesian single-population analysis of 69 globular clusters.

WAGNER-KAISER R., SARAJEDINI A., VON HIPPEL T., STENNING D.C., VAN DYK D.A., JEFFERY E., ROBINSON E., STEIN N., ANDERSON J. and JEFFERYS W.H.

Abstract (from CDS):

We use Hubble Space Telescope (HST) imaging from the ACS Treasury Survey to determine fits for single population isochrones of 69 Galactic globular clusters. Using robust Bayesian analysis techniques, we simultaneously determine ages, distances, absorptions and helium values for each cluster under the scenario of a 'single' stellar population on model grids with solar ratio heavy element abundances. The set of cluster parameters is determined in a consistent and reproducible manner for all clusters using the Bayesian analysis suite BASE-9. Our results are used to re-visit the age-metallicity relation. We find correlations with helium and several other parameters such as metallicity, binary fraction and proxies for cluster mass. The helium abundances of the clusters are also considered in the context of carbon, nitrogen, and oxygen abundances and the multiple population scenario.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Hertzsprung-Russell and colour-magnitude diagrams - Galaxy: formation - globular clusters: general - globular clusters: general

Simbad objects: 70

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2020.02.24-00:18:31

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