Observational Constraints on the Age-Metallicity Relation from White Dwarf-Main Sequence Binaries

被引：0
|
作者：
Rebassa-Mansergas, A. [1 ,3 ]
Anguiano, B. [2 ]
Garcia-Berro, E. [1 ,3 ]
Freeman, K. C. [4 ]
Cojocaru, R. [1 ,3 ]
Manser, C. J. [5 ]
Pala, A. F. [5 ]
Gansicke, B. T. [5 ]
Liu, X. -W. [6 ,7 ]
机构：
[1] Univ Politecn Cataluna, Dept Fis, C Esteve Terrades 5, Castelldefels 08860, Spain
[2] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia
[3] Inst Space Studies Catalonia, C Gran Capita 2-4,Edif Nexus 201, Barcelona 08034, Spain
[4] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia
[5] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
[6] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
[7] Peking Univ, Dept Astron, Beijing 100871, Peoples R China
来源：
20TH EUROPEAN WHITE DWARF WORKSHOP | 2017年 / 509卷
基金：
澳大利亚研究理事会; 欧洲研究理事会;
关键词：
COMMON-ENVELOPE BINARIES; FINAL MASS RELATIONSHIP; MILKY-WAY DISK; CHEMICAL ENRICHMENT; SOLAR NEIGHBORHOOD; EVOLUTION; STARS; SDSS;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The age-metallicity relation (AMR) is a fundamental observational property to understand how the Galactic disc formed and evolved chemically in time. However, there is not yet a consensus on the observed properties of the AMR for the solar neighbourhood. This is due primarily to the difficulty of obtaining precise stellar ages for individual field stars. We have started an observational campaign to provide the much needed observational AMR by using 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 white dwarfs and main sequence stars in these binary systems are coeval, these binaries provide an unique opportunity to observationally determine in a robust way the AMR. Here we present the AMR derived from the analysis of a sample of 23 WDMS binaries.
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收藏
页码：481 / 488
页数：8
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