Testing the Asteroseismic Mass Scale Using Metal-Poor Stars Characterized With APOGEE and Kepler

dc.contributor.utaustinauthorShetrone, Matthewen_US
dc.creatorEpstein, Courtney R.en_US
dc.creatorElsworth, Yvonne P.en_US
dc.creatorJohnson, Jennifer A.en_US
dc.creatorShetrone, Matthewen_US
dc.creatorMosser, Benoiten_US
dc.creatorHekker, Saskiaen_US
dc.creatorTayar, Jamieen_US
dc.creatorHarding, Paulen_US
dc.creatorPinsonneault, Marcen_US
dc.creatorAguirre, Victor Silvaen_US
dc.creatorBasu, Sarbanien_US
dc.creatorBeers, Timothy C.en_US
dc.creatorBizyaev, Dmitryen_US
dc.creatorBedding, Timothy R.en_US
dc.creatorChaplin, William J.en_US
dc.creatorFrinchaboy, Peter M.en_US
dc.creatorGarcia, Rafael A.en_US
dc.creatorPerez, Ana E. Garciaen_US
dc.creatorHearty, Fred R.en_US
dc.creatorHuber, Danielen_US
dc.creatorIvans, Inese I.en_US
dc.creatorMajewski, Steven R.en_US
dc.creatorMathur, Savitaen_US
dc.creatorNidever, Daviden_US
dc.creatorSerenelli, Aldoen_US
dc.creatorSchiavon, Ricardo P.en_US
dc.creatorSchneider, Donald P.en_US
dc.creatorSchoenrichi, Ralphen_US
dc.creatorSobeck, Jennifer S.en_US
dc.creatorStassun, Keivan G.en_US
dc.creatorStello, Dennisen_US
dc.creatorZasowski, Gailen_US
dc.description.abstractFundamental stellar properties, such as mass, radius, and age, can be inferred using asteroseismology. Cool stars with convective envelopes have turbulent motions that can stochastically drive and damp pulsations. The properties of the oscillation frequency power spectrum can be tied to mass and radius through solar-scaled asteroseismic relations. Stellar properties derived using these scaling relations need verification over a range of metallicities. Because the age and mass of halo stars are well-constrained by astrophysical priors, they provide an independent, empirical check on asteroseismic mass estimates in the low-metallicity regime. We identify nine metal-poor red giants (including six stars that are kinematically associated with the halo) from a sample observed by both the Kepler space telescope and the Sloan Digital Sky Survey-III APOGEE spectroscopic survey. We compare masses inferred using asteroseismology to those expected for halo and thick-disk stars. Although our sample is small, standard scaling relations, combined with asteroseismic parameters from the APOKASC Catalog, produce masses that are systematically higher ((Delta M) = 0.17 +/- 0.05 M-circle dot) than astrophysical expectations. The magnitude of the mass discrepancy is reduced by known theoretical corrections to the measured large frequency separation scaling relationship. Using alternative methods for measuring asteroseismic parameters induces systematic shifts at the 0.04 M-circle dot level. We also compare published asteroseismic analyses with scaling relationship masses to examine the impact of using the frequency of maximum power as a constraint. Upcoming APOKASC observations will provide a larger sample of similar to 100 metal-poor stars, important for detailed asteroseismic characterization of Galactic stellar populations.en_US
dc.description.departmentMcDonald Observatoryen_US
dc.description.sponsorshipAlfred P. Sloan Foundationen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.description.sponsorshipU.S. Department of Energy Office of Scienceen_US
dc.description.sponsorshipUniversity of Arizonaen_US
dc.description.sponsorshipBrazilian Participation Groupen_US
dc.description.sponsorshipBrookhaven National Laboratoryen_US
dc.description.sponsorshipCarnegie Mellon Universityen_US
dc.description.sponsorshipUniversity of Floridaen_US
dc.description.sponsorshipFrench Participation Groupen_US
dc.description.sponsorshipGerman Participation Groupen_US
dc.description.sponsorshipHarvard Universityen_US
dc.description.sponsorshipInstituto de Astrofisica de Canariasen_US
dc.description.sponsorshipMichigan State/Notre Dame/JINA Participation Groupen_US
dc.description.sponsorshipJohns Hopkins Universityen_US
dc.description.sponsorshipLawrence Berkeley National Laboratoryen_US
dc.description.sponsorshipMax Planck Institute for Astrophysicsen_US
dc.description.sponsorshipMax Planck Institute for Extraterrestrial Physicsen_US
dc.description.sponsorshipNew Mexico State Universityen_US
dc.description.sponsorshipNew York Universityen_US
dc.description.sponsorshipOhio State Universityen_US
dc.description.sponsorshipPennsylvania State Universityen_US
dc.description.sponsorshipUniversity of Portsmouthen_US
dc.description.sponsorshipPrinceton Universityen_US
dc.description.sponsorshipSpanish Participation Groupen_US
dc.description.sponsorshipUniversity of Tokyoen_US
dc.description.sponsorshipUniversity of Utahen_US
dc.description.sponsorshipVanderbilt Universityen_US
dc.description.sponsorshipUniversity of Virginiaen_US
dc.description.sponsorshipUniversity of Washingtonen_US
dc.description.sponsorshipYale Universityen_US
dc.description.sponsorshipPhysics Frontier Center/Joint Institute for Nuclear Astrophysics (JINA) PHY 08-22648en_US
dc.description.sponsorshipNASA NNX12AE17Gen_US
dc.description.sponsorshipNetherlands Organization for Scientific Researchen_US
dc.description.sponsorshipERC 338251en_US
dc.description.sponsorshipMICINN AYA2011-24704en_US
dc.description.sponsorshipDanish National Research Foundation DNRF106en_US
dc.description.sponsorshipASTERISK project (AS-TERoseismic Investigations with SONG and Kepler)en_US
dc.description.sponsorshipEuropean Research Councilen_US
dc.description.sponsorship267864 AST-1211673en_US
dc.identifier.citationEpstein, Courtney R., Yvonne P. Elsworth, Jennifer A. Johnson, Matthew Shetrone, Benoît Mosser, Saskia Hekker, Jamie Tayar et al. "Testing the Asteroseismic Mass Scale Using Metal-poor Stars Characterized with APOGEE and Kepler." The Astrophysical Journal Letters, Vol. 785, No. 2 (Apr., 2014): L28.en_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectgalaxy: haloen_US
dc.subjectstars: fundamental parametersen_US
dc.subjectsolar-like oscillationsen_US
dc.subjectdigital sky surveyen_US
dc.subjectngc 6791en_US
dc.subjectred giantsen_US
dc.subjecthipparcos parallaxesen_US
dc.subjectbranch starsen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleTesting the Asteroseismic Mass Scale Using Metal-Poor Stars Characterized With APOGEE and Kepleren_US

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