VERIFYING ASTEROSEISMICALLY DETERMINED PARAMETERS OF KEPLER STARS USING HIPPARCOS PARALLAXES: SELF-CONSISTENT STELLAR PROPERTIES AND DISTANCES

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Silva S Aguirre (Author) Other; Casagrande, L (Author) Other; Basu, S (Author) Other; Campante, TL (Author) Other; Chaplin, WJ (Author) Other; Huber, D (Author) Other; Miglio, A (Author) Other; Serenelli, AM (Author) Other; Ballot, J (Author) Other; Bedding, TR (Author) Other; Christensen Dalsgaard, J (Author) Other; Creevey, OL (Author) Other; Elsworth, Y (Author) Other; Garcia, RA (Author) Other; Gilliland, RL (Author) Other; Hekker, S (Author) Other; Kjeldsen, H (Author) Other; Mathur, S (Author) Other; Metcalfe, TS (Author) Other; Monteiro, MJPFG (Author) FCUP; Mosser, B (Author) Other; Pinsonneault, MH (Author) Other; Stello, D (Author) Other; Weiss, A (Author) Other; Tenenbaum, P (Author) Other; Twicken, JD (Author) Other; Uddin, K (Author) Other

Journal

Title: Astrophysical Journal

Vol. 757

Final page: 99

ISSN: 0004-637X

Publisher: American Astronomical Society

Indexing

ISI Web of Knowledge - 118 Citations

Scopus - 122 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Astronomy

Other information

Authenticus ID: P-002-5DP

DOI: 10.1088/0004-637x/757/1/99

Abstract (EN): Accurately determining the properties of stars is of prime importance for characterizing stellar populations in our Galaxy. The field of asteroseismology has been thought to be particularly successful in such an endeavor for stars in different evolutionary stages. However, to fully exploit its potential, robust methods for estimating stellar parameters are required and independent verification of the results is mandatory. With this purpose, we present a new technique to obtain stellar properties by coupling asteroseismic analysis with the InfraRed Flux Method. By using two global seismic observables and multi-band photometry, the technique allows us to obtain masses, radii, effective temperatures, bolometric fluxes, and hence distances for field stars in a self-consistent manner. We apply our method to 22 solar-like oscillators in the Kepler short-cadence sample, that have accurate Hipparcos parallaxes. Our distance determinations agree to better than 5%, while measurements of spectroscopic effective temperatures and interferometric radii also validate our results. We briefly discuss the potential of our technique for stellar population analysis and models of Galactic Chemical Evolution.

Language: English

Type (Professor's evaluation): Scientific