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A BAYESIAN ANALYSIS OF THE AGES OF FOUR OPEN CLUSTERS
File | Description | Size | Format | |
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apj-4clusters-2016.pdf | Accepted version | 10.72 MB | Adobe PDF | View/Open |
Jeffery_2016_ApJ_828_79.pdf | Published version | 3.3 MB | Adobe PDF | View/Open |
Title: | A BAYESIAN ANALYSIS OF THE AGES OF FOUR OPEN CLUSTERS |
Authors: | Jeffery, EJ Von Hippel, T Van Dyk, DA Stenning, DC Robinson, E Stein, N Jefferys, WH |
Item Type: | Journal Article |
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. |
Issue Date: | 6-Sep-2016 |
Date of Acceptance: | 20-Jun-2016 |
URI: | http://hdl.handle.net/10044/1/34011 |
DOI: | https://dx.doi.org/10.3847/0004-637X/828/2/79 |
ISSN: | 1538-4357 |
Publisher: | American Astronomical Society |
Journal / Book Title: | Astrophysical Journal |
Volume: | 828 |
Copyright Statement: | © 2016. The American Astronomical Society. All rights reserved. |
Sponsor/Funder: | The Royal Society Commission of the European Communities European Commission |
Funder's Grant Number: | WM110023 FP7-PEOPLE-2012-CIG-321865 H2020-MSCA-RISE-2015-691164 |
Keywords: | Science & Technology Physical Sciences Astronomy & Astrophysics open clusters and associations: general open clusters and associations: individual (NGC 2360, NGC 2477, NGC 2660, NGC 3960) OLD OPEN CLUSTERS GALACTIC CHEMICAL EVOLUTION COLOR-MAGNITUDE DIAGRAMS WHITE-DWARF AGE STELLAR EVOLUTION RED GIANTS CCD PHOTOMETRY KEY TRACERS NGC 2360 PARAMETERS 0201 Astronomical And Space Sciences 0305 Organic Chemistry 0306 Physical Chemistry (Incl. Structural) |
Publication Status: | Published |
Article Number: | 79 |
Appears in Collections: | Statistics Faculty of Natural Sciences Mathematics |