Empirically Calibrated Asteroseismic Masses and Radii for Red Giants in the Kepler Fields

Autor(en)

Marc Pinsonneault, Yvonne Elsworth, Victor Silva Aguirre, William J. Chaplin, Rafael A. Garcia, Saskia Hekker, Jon Holtzman, Daniel Huber, Jennifer Johnson, Thomas Kallinger, Benoit Mosser, Savita Mathur, Aldo Serenelli, Matthew Shetrone, Dennis Stello, Jamie Tayar, Joel Zinn

Abstrakt

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 ofthe 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.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Université de recherche Paris Sciences et Lettres, University of New South Wales, Instituto de Astrofísica de Canarias (IAC), Max-Planck-Institut für Sonnensystemforschung, New Mexico State University, University of Texas, Austin, Spanish National Research Council (CSIC), Ohio State University, University of Birmingham, Aarhus University, French Alternative Energies and Atomic Energy Commission (CEA), University of Hawaii

Journal

American Astronomical Society, AAS Meeting

Band

231

Publikationsdatum

01-2018

ÖFOS 2012

103004 Astrophysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f7a75dce-30f2-4c7b-abe8-40f7412d3116