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The age–metallicity relation in the solar neighbourhood from a pilot sample of white dwarf–main sequence binaries
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Rebassa-Mansergas, A., Anguiano, B., García-Berro, E., Freeman, K. C., Cojocaru, R., Manser, Christopher J., Pala, Anna F., Gänsicke, B. T. (Boris T.) and Liu, X.-W. (2016) The age–metallicity relation in the solar neighbourhood from a pilot sample of white dwarf–main sequence binaries. Monthly Notices of the Royal Astronomical Society, 463 (2). pp. 1137-1143. doi:10.1093/mnras/stw2021
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Official URL: http://dx.doi.org/10.1093/mnras/stw2021
Abstract
The age–metallicity relation (AMR) is a fundamental observational constraint for understanding how the Galactic disc formed and evolved chemically in time. However, there is not yet an agreement on the observational properties of the AMR for the solar neighbourhood, primarily due to the difficulty in obtaining accurate stellar ages for individual field stars. We have started an observational campaign for providing the much needed observational input by using wide white-dwarf–main-sequence (WDMS) binaries. White dwarfs are ‘natural’ clocks and can be used to derive accurate ages. Metallicities can be obtained from the main-sequence companions. Since the progenitors of white dwarfs and the main-sequence stars were born at the same time, WDMS binaries provide a unique opportunity to observationally constrain in a robust way the properties of the AMR. In this work we present the AMR derived from analysing a pilot sample of 23 WDMS binaries and provide clear observational evidence for the lack of correlation between age and metallicity at young and intermediate ages
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||||||
| Divisions: | Faculty of Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | White dwarf stars , Low mass stars, Stellar activity, Double stars | ||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
| Publisher: | Oxford University Press | ||||||||
| ISSN: | 0035-8711 | ||||||||
| Official Date: | 12 August 2016 | ||||||||
| Dates: |
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| Volume: | 463 | ||||||||
| Number: | 2 | ||||||||
| Page Range: | pp. 1137-1143 | ||||||||
| DOI: | 10.1093/mnras/stw2021 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | Spain. Ministerio de Economía y Competitividad [Ministry of Economy and Competitiveness] (MINECO), L'Agència de Gestió d'Ajuts Universitaris i de Recerca (AGAUR), Seventh Framework Programme (European Commission) (FP7), European Research Council (ERC), Zhōngguó zhèjiāng shěng zìrán kēxué jījīn (China) [Zhejiang Provincial Natural Science Foundation of China] (ZPNSFC), Australian Research Council (ARC) | ||||||||
| Grant number: | AYA2014-59084-P (MINECO), FP/2007-2013 (FP7), n.320964 (ERC), 2014CB845700 (ZPNSFC), FS110200035 (ARC) |
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