Verification of the Kepler Input Catalog from Asteroseismology of Solar-type Stars
Graham A. Verner
(1)
,
William J. Chaplin
(1)
,
Sarbani Basu
(2)
,
Timothy M. Brown
(3)
,
Saskia Hekker
(4)
,
Daniel Huber
(5)
,
Christoffer Karoff
(6)
,
Savita Mathur
(7)
,
Travis S. Metcalfe
(7)
,
Benoît Mosser
(8, 9)
,
Pierre-Olivier Quirion
(10)
,
Thierry Appourchaux
(11)
,
Timothy R. Bedding
(5)
,
H. Bruntt
(6)
,
Tiago L. Campante
(12)
,
Yvonne P. Elsworth
(1)
,
Rafael A. Garcia
(13)
,
Rasmus Handberg
(6)
,
Clara Regulo
(14)
,
Ian W. Roxburgh
(15)
,
Dennis Stello
(5)
,
Jörgen Christensen-Dalsgaard
(6)
,
Ronald L. Gilliland
(16)
,
Steven D. Kawaler
(17)
,
Hans Kjeldsen
(6)
,
Christine Allen
(18)
,
B. D. Clarke
(19)
,
F. R. Girouard
(18)
1
School of Physics and Astronomy, University of Birmingham
2 Department of Astronomy, Yale University
3 Las Cumbres Observatory, Goleta
4 AI PANNEKOEK - Astronomical Institute Anton Pannekoek
5 SIfA - Sydney Institute for Astronomy
6 DASC - Danish AsteroSeismology Centre
7 High Altitude Observatory, National Center for Atmospheric Research
8 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
9 Etoile
10 CSA - Canadian Space Agency
11 IAS - Institut d'astrophysique spatiale
12 Universidade do Porto = University of Porto
13 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
14 ULL - Universidad de La Laguna [Tenerife - SP]
15 School of Mathematical Sciences, Queen Mary Unversity of London
16 STScI - Space Telescope Science Institute
17 Department of Physics and Astronomy, Iowa State University
18 Orbital Sciences Corporation, NASA Ames Research Center, Moffett Field
19 SETI Institute, NASA Ames Research Center, Moffett Field
2 Department of Astronomy, Yale University
3 Las Cumbres Observatory, Goleta
4 AI PANNEKOEK - Astronomical Institute Anton Pannekoek
5 SIfA - Sydney Institute for Astronomy
6 DASC - Danish AsteroSeismology Centre
7 High Altitude Observatory, National Center for Atmospheric Research
8 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
9 Etoile
10 CSA - Canadian Space Agency
11 IAS - Institut d'astrophysique spatiale
12 Universidade do Porto = University of Porto
13 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
14 ULL - Universidad de La Laguna [Tenerife - SP]
15 School of Mathematical Sciences, Queen Mary Unversity of London
16 STScI - Space Telescope Science Institute
17 Department of Physics and Astronomy, Iowa State University
18 Orbital Sciences Corporation, NASA Ames Research Center, Moffett Field
19 SETI Institute, NASA Ames Research Center, Moffett Field
Résumé
We calculate precise stellar radii and surface gravities from the asteroseismic analysis of over 500 solar-type pulsating stars observed by the Kepler space telescope. These physical stellar properties are compared with those given in the Kepler Input Catalog (KIC), determined from ground-based multi-color photometry. For the stars in our sample, we find general agreement but we detect an average overestimation bias of 0.23 dex in the KIC determination of log (g) for stars with log (g)KIC > 4.0 dex, and a resultant underestimation bias of up to 50% in the KIC radii estimates for stars with R KIC < 2 R sun. Part of the difference may arise from selection bias in the asteroseismic sample; nevertheless, this result implies there may be fewer stars characterized in the KIC with R ~ 1 R sun than is suggested by the physical properties in the KIC. Furthermore, if the radius estimates are taken from the KIC for these affected stars and then used to calculate the size of transiting planets, a similar underestimation bias may be applied to the planetary radii.