Precise Ages of Field Stars from White Dwarf Companions in Gaia DR2
Qiu,Dan1,2; Tian,Hai-Jun1,2; Wang,Xi-Dong1; Nie,Jia-Lu3; Hippel,Ted von4; Liu,Gao-Chao1,2; Fouesneau,Morgan5; Rix,Hans-Walter5
Source PublicationThe Astrophysical Journal Supplement Series
AbstractAbstract We analyze 4050 wide binary star systems involving a white dwarf (WD) and usually a main-sequence (MS) star, drawn from the large sample assembled by Tian et al. Using the modeling code BASE-9, we determine the system’s ages, the WD progenitors’ zero-age MS masses, the extinction values (AV), and the distance moduli. Discarding the cases with poor age convergences, we obtain ages for 3551 WDs, with a median age precision of στ/τ = 20%, and system ages typically in the range of 1–6 Gyr. We validated these ages against the very few known clusters and through cross validation of 236 WD-WD binaries. Under the assumption that the components are coeval in a binary system, this provides precise age constraints on the usually low-mass MS companions, mostly inaccessible by any other means.
KeywordStellar ages Wide binary stars Field stars Markov chain Monte Carlo Bayesian statistics Main sequence stars White dwarf stars Zero-age main sequence stars Stellar evolutionary tracks Initial mass function Photometry
WOS IDIOP:0067-0049-253-2-abe468
PublisherThe American Astronomical Society
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Document Type期刊论文
Corresponding AuthorTian,Hai-Jun
Affiliation1.China Three Gorges University, Yichang 443002, People’s Republic of China;
2.Center of Astronomy and Space Sciences, China Three Gorges University, Yichang 443002, People’s Republic of China
3.Key Lab for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
4.Physical Sciences Department, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114, USA
5.Max Planck Institute for Astronomy, K?nigstuhl 17, D-69117 Heidelberg, Germany
Recommended Citation
GB/T 7714
Qiu,Dan,Tian,Hai-Jun,Wang,Xi-Dong,et al. Precise Ages of Field Stars from White Dwarf Companions in Gaia DR2[J]. The Astrophysical Journal Supplement Series,2021,253(2).
APA Qiu,Dan.,Tian,Hai-Jun.,Wang,Xi-Dong.,Nie,Jia-Lu.,Hippel,Ted von.,...&Rix,Hans-Walter.(2021).Precise Ages of Field Stars from White Dwarf Companions in Gaia DR2.The Astrophysical Journal Supplement Series,253(2).
MLA Qiu,Dan,et al."Precise Ages of Field Stars from White Dwarf Companions in Gaia DR2".The Astrophysical Journal Supplement Series 253.2(2021).
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