期刊
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
卷 233, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4365/aa97df
关键词
asteroseismology; catalogs; stars: fundamental parameters; surveys
资金
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Center for High- Performance Computing at the University of Utah
- MINECO [ESP2015-66134-R]
- NASA [NNX15AF13G]
- Danish National Research Foundation [DNRF106]
- VILLUM FONDEN [10118]
- Danish Council for Independent Research-Natural Science [DFF-4181-00415]
- European Research Council under the European Community's Seventh Framework Programme/ERC [338251]
- Australian Research Council [FT1400147]
- CNES
- Ramon y Cajal fellowship [RYC-2013-14182]
- Spanish Ministry of Economy and Competitiveness (MINECO) [AYA-2014-58082-P]
- STFC [ST/M00077X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/M00077X/1] Funding Source: researchfish
- Villum Fonden [00010118] Funding Source: researchfish
We present the first APOKASC catalog of spectroscopic and asteroseismic data for dwarfs and subgiants. Asteroseismic data for our sample of 415 objects have been obtained by the Kepler mission in short (58.5. s) cadence, and light curves span from 30 up to more than 1000. days. The spectroscopic parameters are based on spectra taken as part of the Apache Point Observatory Galactic Evolution Experiment and correspond to Data Release 13 of the Sloan Digital Sky Survey. We analyze our data using two independent T-eff scales, the spectroscopic values from DR13 and those derived from SDSS griz photometry. We use the differences in our results arising from these choices as a test of systematic temperature uncertainties and find that they can lead to significant differences in the derived stellar properties. Determinations of surface gravity (log g), mean density (), radius (R), mass (M), and age (tau) for the whole sample have been carried out by means of (stellar) grid-based modeling. We have thoroughly assessed random and systematic error sources in the spectroscopic and asteroseismic data, as well as in the grid-based modeling determination of the stellar quantities provided in the catalog. We provide stellar properties determined for each of the two Teff scales. The median combined (random and systematic) uncertainties are 2% (0.01 dex; log g), 3.4% (), 2.6% (R), 5.1%(M), and 19% (tau) for the photometric Teff scale and 2% (log g), 3.5%(), 2.7%(R), 6.3%(M), and 23% (tau) for the spectroscopic scale. We present comparisons with stellar quantities in the asteroseismic catalog by Chaplin et al. that highlight the importance of having metallicity measurements for determining stellar parameters accurately. Finally, we compare our results with those coming from a variety of sources, including stellar radii determined from TGAS parallaxes and asteroseismic analyses based on individual frequencies. We find a very good agreement for all inferred quantities. The latter comparison, in particular, gives strong support to the determination of stellar quantities based on global seismology, a relevant result for future missions such as TESS and PLATO.
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