Global asteroseismic properties of solar-like oscillations observed by Kepler: a comparison of complementary analysis methods
Graham A. Verner
(1)
,
Yvonne P. Elsworth
(2)
,
William J. Chaplin
(2)
,
Tiago L. Campante
(3)
,
Enrico Corsaro
(4)
,
Patrick Gaulme
(5)
,
Saskia Hekker
(2)
,
Daniel Huber
(6)
,
Christoffer Karoff
(7)
,
Savita Mathur
(8)
,
Benoît Mosser
(9, 10)
,
Thierry Appourchaux
(5)
,
Jérôme Ballot
(11)
,
Timothy R. Bedding
(6)
,
Alfio Bonanno
(4)
,
A. M. Broomhall
(2)
,
Rafael A. Garcia
(12)
,
Rasmus Handberg
(7)
,
R. New
(13)
,
Dennis Stello
(14)
,
Clara Regulo
(15)
,
Ian W. Roxburgh
(1)
,
David Salabert
(15)
,
Timothy R. White
(6)
,
Douglas A. Caldwell
(16)
,
Jessie L. Christiansen
(16)
,
Michael M. Fanelli
(17)
1
School of Mathematical Sciences, Queen Mary Unversity of London
2 School of Physics and Astronomy, University of Birmingham
3 Universidade do Porto = University of Porto
4 INAF-OACt - INAF-Osservatorio Astrofisico di Catania
5 IAS - Institut d'astrophysique spatiale
6 SIfA - Sydney Institute for Astronomy
7 DASC - Danish AsteroSeismology Centre
8 High Altitude Observatory, National Center for Atmospheric Research
9 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
10 Etoile
11 IRAP - Institut de recherche en astrophysique et planétologie
12 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
13 Faculty of Arts, Computing, Engineering and Sciences
14 AI PANNEKOEK - Astronomical Institute Anton Pannekoek
15 IAC - Instituto de Astrofisica de Canarias
16 SETI Institute, NASA Ames Research Center, Moffett Field
17 BAER - Bay Area Environmental Research Institute
2 School of Physics and Astronomy, University of Birmingham
3 Universidade do Porto = University of Porto
4 INAF-OACt - INAF-Osservatorio Astrofisico di Catania
5 IAS - Institut d'astrophysique spatiale
6 SIfA - Sydney Institute for Astronomy
7 DASC - Danish AsteroSeismology Centre
8 High Altitude Observatory, National Center for Atmospheric Research
9 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
10 Etoile
11 IRAP - Institut de recherche en astrophysique et planétologie
12 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
13 Faculty of Arts, Computing, Engineering and Sciences
14 AI PANNEKOEK - Astronomical Institute Anton Pannekoek
15 IAC - Instituto de Astrofisica de Canarias
16 SETI Institute, NASA Ames Research Center, Moffett Field
17 BAER - Bay Area Environmental Research Institute
Résumé
We present the asteroseismic analysis of 1948 F-, G- and K-type main-sequence and subgiant stars observed by the National Aeronautics and Space Administration Kepler mission. We detect and characterize solar-like oscillations in 642 of these stars. This represents the largest cohort of main-sequence and subgiant solar-like oscillators observed to date. The photometric observations are analysed using the methods developed by nine independent research teams. The results are combined to validate the determined global asteroseismic parameters and calculate the relative precision by which the parameters can be obtained. We correlate the relative number of detected solar-like oscillators with stellar parameters from the Kepler Input Catalogue and find a deficiency for stars with effective temperatures in the range 5300 ≲Teff≲ 5700 K and a drop-off in detected oscillations in stars approaching the red edge of the classical instability strip. We compare the power-law relationships between the frequency of peak power, numax, the mean large frequency separation, Deltanu, and the maximum mode amplitude, Amax, and show that there are significant method-dependent differences in the results obtained. This illustrates the need for multiple complementary analysis methods to be used to assess the robustness and reproducibility of results derived from global asteroseismic parameters.