Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 489, Issue 4, Pages 4641-4657Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz2356
Keywords
asteroseismology; stars: evolution; stars: low-mass; stars: oscillations
Categories
Funding
- European Research Council (ERC) Consolidator Grant funding scheme (project ASTE-ROCHRONOMETRY) [772293]
- Spanish Government [ESP2017-82674-R]
- Generalitat de Catalunya [2017-SGR-1131]
- Australian Research Council Future Fellowship [FT1400147]
- National Aeronautica and Space Administration (NASA) by the Space Telescope Science Institute [51424]
- NASA [NAS5-26555]
- FCT - Fundao para a Cincia e a Tecnologia
- FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalizao [PTDC/FIS-AST/30389/2017, POCI-010145-FEDER-030389, UID/FIS/04434/2013, POCI-01-0145FEDER-007672]
- European Research Council under the European Community's Seventh Framework Programme (FP7/2007-2013)/ERC [338251]
- UK Science and Technology Facilities Council (STFC)
- Danish National Research Foundation [DNRF106]
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Brazilian Participation Group
- Carnegie Institution for Science, Carnegie Mellon University
- Chilean Participation Group
- French Participation Group
- Harvard-Smithsonian Center for Astrophysics
- Johns Hopkins University
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Korean Participation Group
- Lawrence Berkeley National Laboratory
- Leibniz Institut fur Astrophysik Potsdam (AIP)
- MaxPlanck-Institut fur Astronomie (MPIA Heidelberg)
- Max-PlanckInstitut fur Astrophysik (MPA Garching)
- Max-Planck-Institut fur Extraterrestrische Physik (MPE)
- National Astronomical Observatories of China
- NewYork University
- University of Notre Dame
- Observatario Nacional/MCTI
- Pennsylvania State University
- Shanghai Astronomical Observatory
- United Kingdom Participation Group
- UniversidadNacionalAutonoma deMexico
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Portsmouth
- University of Utah
- University of Virginia
- University of Washington
- University of Wisconsin
- Vanderbilt University
- Yale University
- Instituto de Astrof'isica de Canarias
- Center for High-Performance Computing at the University of Utah
- NewMexico State University
- The Ohio State University
Ask authors/readers for more resources
The internal working of low-mass stars is of great significance to both the study of stellar structure and the history of the Milky Way. Asteroseismology has the power to directly sense the internal structure of stars and allows for the determination of the evolutionary state - i.e. has helium burning commenced or is the energy generated only by the fusion in the hydrogen-burning shell? We use observational data from red-giant stars in a combination (known as APOKASC) of asteroseismology (from the Kepler mission) and spectroscopy (from SDSS/APOGEE). The new feature of the analysis is that the APOKASC evolutionary state determination is based on the comparison of diverse approaches to the investigation of the frequency-power spectrum. The high level of agreement between the methods is a strong validation of the approaches. Stars for which there is not a consensus view are readily identified. The comparison also facilitates the identification of unusual stars including those that show evidence for very strong coupling between p and g cavities. The comparison between the classification based on the spectroscopic data and asteroseismic data have led to a new value for the statistical uncertainty in APOGEE temperatures. These consensus evolutionary states will be used as an input for methods that derive masses and ages for these stars based on comparison of observables with stellar evolutionary models ('grid-based modelling') and as a training set for machine-learning and other data-driven methods of evolutionary state determination.
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