Bibcode
Pinsonneault, M. H.; Elsworth, Yvonne; Epstein, Courtney; Hekker, Saskia; Mészáros, Sz.; Chaplin, William J.; Johnson, Jennifer A.; García, Rafael A.; Holtzman, Jon; Mathur, Savita; García Pérez, Ana; Silva Aguirre, Victor; Girardi, Léo; Basu, Sarbani; Shetrone, Matthew; Stello, Dennis; Allende Prieto, C.; An, Deokkeun; Beck, Paul; Beers, Timothy C.; Bizyaev, Dmitry; Bloemen, Steven; Bovy, Jo; Cunha, Katia; De Ridder, Joris; Frinchaboy, Peter M.; García-Hernández, D. A.; Gilliland, Ronald; Harding, Paul; Hearty, Fred R.; Huber, Daniel; Ivans, Inese; Kallinger, Thomas; Majewski, Steven R.; Metcalfe, Travis S.; Miglio, Andrea; Mosser, Benoit; Muna, Demitri; Nidever, David L.; Schneider, Donald P.; Serenelli, Aldo; Smith, Verne V.; Tayar, Jamie; Zamora, O.; Zasowski, Gail
Referencia bibliográfica
The Astrophysical Journal Supplement, Volume 215, Issue 2, article id. 19, 23 pp. (2014).
Fecha de publicación:
12
2014
Número de citas
272
Número de citas referidas
241
Descripción
We present the first APOKASC catalog of spectroscopic and asteroseismic
properties of 1916 red giants observed in the Kepler fields. The
spectroscopic parameters provided from the Apache Point Observatory
Galactic Evolution Experiment project are complemented with
asteroseismic surface gravities, masses, radii, and mean densities
determined by members of the Kepler Asteroseismology Science Consortium.
We assess both random and systematic sources of error and include a
discussion of sample selection for giants in the Kepler fields. Total
uncertainties in the main catalog properties are of the order of 80 K in
T eff, 0.06 dex in [M/H], 0.014 dex in log g, and 12% and 5%
in mass and radius, respectively; these reflect a combination of
systematic and random errors. Asteroseismic surface gravities are
substantially more precise and accurate than spectroscopic ones, and we
find good agreement between their mean values and the calibrated
spectroscopic surface gravities. There are, however, systematic
underlying trends with T eff and log g. Our effective
temperature scale is between 0 and 200 K cooler than that expected from
the infrared flux method, depending on the adopted extinction map, which
provides evidence for a lower value on average than that inferred for
the Kepler Input Catalog (KIC). We find a reasonable correspondence
between the photometric KIC and spectroscopic APOKASC metallicity
scales, with increased dispersion in KIC metallicities as the absolute
metal abundance decreases, and offsets in T eff and log g
consistent with those derived in the literature. We present mean fitting
relations between APOKASC and KIC observables and discuss future
prospects, strengths, and limitations of the catalog data.
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