Bibcode
Pinsonneault, Marc; Elsworth, Yvonne; Silva Aguirre, Victor; Chaplin, William J.; Garcia, Rafael A.; Hekker, Saskia; Holtzman, Jon; Huber, Daniel; Johnson, Jennifer; Kallinger, Thomas; Mosser, Benoit; Mathur, S.; Serenelli, Aldo; Shetrone, Matthew; Stello, Dennis; Tayar, Jamie; Zinn, Joel; APOGEE Team, KASC Team, APOKASC Team
Bibliographical reference
American Astronomical Society, AAS Meeting #231, id.#450.13
Advertised on:
1
2018
Citations
1
Refereed citations
1
Description
We report on the joint asteroseismic and spectroscopic properties of a
sample of 6048 evolved stars in the fields originally observed by the
Kepler satellite. We use APOGEE spectroscopic data taken from Data
Release 13 of the Sloan Digital Sky Survey, combined with asteroseismic
data analyzed by members of the Kepler Asteroseismic Science Consortium.
With high statistical significance, the different pipelines do not have
relative zero points that are the same as the solar values, and red
clump stars do not have the same empirical relative zero points as red
giants. We employ theoretically motivated corrections to the scaling
relation for the large frequency spacing, and adjust the zero point of
the frequency of maximum power scaling relation to be consistent with
masses and radii for members of star clusters. The scatter in calibrator
masses is consistent with our error estimation. Systematic and random
mass errors are explicitly separated and identified. The measurement
scatter, and random uncertainties, are three times larger for red giants
where one or more technique failed to return a value than for targets
where all five methods could do so, and this is a substantial fraction
of the sample (20% of red giants and 25% of red clump stars). Overall
trends and future prospects are discussed.