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BAFFLES: Bayesian Ages for Field Lower-mass Stars
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dc.contributor.author | Stanford-Moore, S. Adam | |
dc.contributor.author | Nielsen, Eric L. | |
dc.contributor.author | De Rosa, Robert J. | |
dc.contributor.author | Macintosh, Bruce | |
dc.contributor.author | Czekala, Ian | |
dc.date.accessioned | 2023-08-29T09:30:15Z | |
dc.date.available | 2023-08-29T09:30:15Z | |
dc.date.issued | 2020-07-20 | |
dc.identifier | 293199907 | |
dc.identifier | 1547b999-d3ba-4ba6-84bf-2a90aea28265 | |
dc.identifier | 85088949490 | |
dc.identifier.citation | Stanford-Moore , S A , Nielsen , E L , De Rosa , R J , Macintosh , B & Czekala , I 2020 , ' BAFFLES: Bayesian Ages for Field Lower-mass Stars ' , Astrophysical Journal , vol. 898 , no. 1 , 27 . https://doi.org/10.3847/1538-4357/ab9a35 | en |
dc.identifier.issn | 0004-637X | |
dc.identifier.other | BibCode: 2020ApJ...898...27S | |
dc.identifier.other | ORCID: /0000-0002-1483-8811/work/141643341 | |
dc.identifier.uri | https://hdl.handle.net/10023/28248 | |
dc.description | Funding: R.D. acknowledges support from the Fonds de Recherche du Québec. Supported by NSF grants AST-1411868 (E.L.N., B.M.), and AST-1518332 (R.J.D.R.). Supported by NASA grants NNX14AJ80G (E.L.N., B.M.), NNX15AC89G and NNX15AD95G (B.M., R.J.D.R.), 80NSSC17K0535 (B.M., E.L.N., R.J.D.R), and NASA Hubble Fellowship grant HST-HF2-51405.001-A (I.C.). | en |
dc.description.abstract | Age is a fundamental parameter of stars, yet in many cases, ages of individual stars are presented without robust estimates of the uncertainty. We have developed a Bayesian framework, BAFFLES, to produce the age posterior for a star from its calcium emission strength (log(R′HK)) or lithium abundance (Li EW) and B − V color. We empirically determine the likelihood functions for calcium and lithium as functions of age from literature measurements of stars in benchmark clusters with well-determined ages. We use a uniform prior on age, which reflects a uniform star formation rate. The age posteriors we derive for several test cases are consistent with literature ages found from other methods. BAFFLES represents a robust method to determine the age posterior probability distribution for any field star with 0.45 ≤ B − V ≤ 0.9 and a measurement of R′HK and/or 0.35 ≤ B − V ≤ 1.9 and measured Li EW. We compile colors, R′HK, and Li EW from over 2630 nearby field stars from the literature, and present the derived BAFFLES age posterior for each star. | |
dc.format.extent | 21 | |
dc.format.extent | 1977368 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal | en |
dc.subject | Stellar activity | en |
dc.subject | Stellar ages | en |
dc.subject | Field stars | en |
dc.subject | Bayesian statistics | en |
dc.subject | QA Mathematics | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | DAS | en |
dc.subject.lcc | QA | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | BAFFLES: Bayesian Ages for Field Lower-mass Stars | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | https://doi.org/10.3847/1538-4357/ab9a35 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/2006.04811 | en |
dc.identifier.url | http://adsabs.harvard.edu/abs/2020ApJ...898...27S | en |
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