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The Second APOKASC Catalog: The Empirical Approach

Title
The Second APOKASC Catalog: The Empirical Approach
Authors
Pinsonneault, Marc H.Elsworth, Yvonne P.Tayar, JamieSerenelli, AldoStello, DennisZinn, JoelMathur, SavitaGarcia, Rafael A.Johnson, Jennifer A.Hekker, SaskiaHuber, DanielKallinger, ThomasMeszaros, SzabolcsMosser, BenoitStassun, KeivanGirardi, LeoRodrigues, Thaise S.Aguirre, Victor SilvaAn, DeokkeunBasu, SarbaniChaplin, William J.Corsaro, EnricoCunha, KatiaGarcia-Hernandez, D. A.Holtzman, JonJonsson, HenrikShetrone, MatthewSmith, Verne V.Sobeck, Jennifer S.Stringfellow, Guy S.Zamora, OlgaBeers, Timothy C.Fernandez-Trincado, J. G.Frinchaboy, Peter M.Hearty, Fred R.Nitschelm, Christian
Ewha Authors
안덕근
SCOPUS Author ID
안덕근scopus
Issue Date
2018
Journal Title
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN
0067-0049JCR Link

1538-4365JCR Link
Citation
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES vol. 239, no. 2
Keywords
stars abundancesstars: fundamental parametersstars: oscillations (including pulsations)
Publisher
IOP PUBLISHING LTD
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
We present a catalog of stellar properties for a large sample of 6676 evolved stars with Apache Point Observatory Galactic Evolution Experiment spectroscopic parameters and Kepler asteroseismic data analyzed using five independent techniques. Our data include evolutionary state, surface gravity, mean density, mass, radius, age, and the spectroscopic and asteroseismic measurements used to derive them. We employ a new empirical approach for combining asteroseismic measurements from different methods, calibrating the inferred stellar parameters, and estimating uncertainties. With high statistical significance, we find that asteroseismic parameters inferred from the different pipelines have systematic offsets that are not removed by accounting for differences in their solar reference values. We include theoretically motivated corrections to the large frequency spacing (Av) scaling relation, and we calibrate the zero-point of the frequency of the maximum power (vmax) relation to be consistent with masses and radii for members of star clusters. For most targets, the parameters returned by different pipelines are in much better agreement than would be expected from the pipeline-predicted random errors, but 22% of them had at least one method not return a result and a much larger measurement dispersion. This supports the usage of multiple analysis techniques for asteroseismic stellar population studies. The measured dispersion in mass estimates for fundamental calibrators is consistent with our error model, which yields median random and systematic mass uncertainties for RGB stars of order 4%. Median random and systematic mass uncertainties are at the 9% and 8% level, respectively, for red clump stars.
DOI
10.3847/1538-4365/aaebfd
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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