Verification of the Kepler Input Catalog from Asteroseismology of Solar-type Stars

G.A. Verner; W.J. Chaplin; S. Basu; T.M. Brown; S. Hekker; D. Huber; Christoffer Karoff; S. Mathur; T.S. Metcalfe; B. Mosser; P.-O. Quirion; T. Appourchaux; T.R. Bedding; Hans Bruntt; T.L. Campante; Y. Elsworth; R.A. García; Rasmus Handberg; C. Régulo; I.W. Roxburgh; D. Stello; Jørgen Christensen-Dalsgaard; R.L. Gilliland; S.D. Kawaler; Hans Kjeldsen; C. Allen; B.D. Clarke; F.R. Girouard

doi:10.1088/2041-8205/738/2/L28

Verification of the Kepler Input Catalog from Asteroseismology of Solar-type Stars

G.A. Verner, W.J. Chaplin, S. Basu, T.M. Brown, S. Hekker, D. Huber, Christoffer Karoff, S. Mathur, T.S. Metcalfe, B. Mosser, P.-O. Quirion, T. Appourchaux, T.R. Bedding, Hans Bruntt, T.L. Campante, Y. Elsworth, R.A. García, Rasmus Handberg, C. Régulo, I.W. RoxburghD. Stello, Jørgen Christensen-Dalsgaard, R.L. Gilliland, S.D. Kawaler, Hans Kjeldsen, C. Allen, B.D. Clarke, F.R. Girouard

Department of Physics and Astronomy

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Abstract

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.

Original language	English
Journal	The Astrophysical Journal Letters
Volume	738
Issue	2
ISSN	2041-8205
DOIs	https://doi.org/10.1088/2041-8205/738/2/L28
Publication status	Published - Sept 2011

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Verner, G. A., Chaplin, W. J., Basu, S., Brown, T. M., Hekker, S., Huber, D., Karoff, C., Mathur, S., Metcalfe, T. S., Mosser, B., Quirion, P.-O., Appourchaux, T., Bedding, T. R., Bruntt, H., Campante, T. L., Elsworth, Y., García, R. A., Handberg, R., Régulo, C., ... Girouard, F. R. (2011). Verification of the Kepler Input Catalog from Asteroseismology of Solar-type Stars. The Astrophysical Journal Letters, 738(2). https://doi.org/10.1088/2041-8205/738/2/L28

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title = "Verification of the Kepler Input Catalog from Asteroseismology of Solar-type Stars",

abstract = "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 \textasciitilde{} 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. ",

author = "G.A. Verner and W.J. Chaplin and S. Basu and T.M. Brown and S. Hekker and D. Huber and Christoffer Karoff and S. Mathur and T.S. Metcalfe and B. Mosser and P.-O. Quirion and T. Appourchaux and T.R. Bedding and Hans Bruntt and T.L. Campante and Y. Elsworth and R.A. Garc{\'i}a and Rasmus Handberg and C. R{\'e}gulo and I.W. Roxburgh and D. Stello and J{\o}rgen Christensen-Dalsgaard and R.L. Gilliland and S.D. Kawaler and Hans Kjeldsen and C. Allen and B.D. Clarke and F.R. Girouard",

year = "2011",

month = sep,

doi = "10.1088/2041-8205/738/2/L28",

language = "English",

volume = "738",

journal = "The Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

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Verner, GA, Chaplin, WJ, Basu, S, Brown, TM, Hekker, S, Huber, D, Karoff, C, Mathur, S, Metcalfe, TS, Mosser, B, Quirion, P-O, Appourchaux, T, Bedding, TR, Bruntt, H, Campante, TL, Elsworth, Y, García, RA, Handberg, R, Régulo, C, Roxburgh, IW, Stello, D, Christensen-Dalsgaard, J, Gilliland, RL, Kawaler, SD, Kjeldsen, H, Allen, C, Clarke, BD & Girouard, FR 2011, 'Verification of the Kepler Input Catalog from Asteroseismology of Solar-type Stars', The Astrophysical Journal Letters, vol. 738, no. 2. https://doi.org/10.1088/2041-8205/738/2/L28

TY - JOUR

T1 - Verification of the Kepler Input Catalog from Asteroseismology of Solar-type Stars

AU - Verner, G.A.

AU - Chaplin, W.J.

AU - Basu, S.

AU - Brown, T.M.

AU - Hekker, S.

AU - Huber, D.

AU - Karoff, Christoffer

AU - Mathur, S.

AU - Metcalfe, T.S.

AU - Mosser, B.

AU - Quirion, P.-O.

AU - Appourchaux, T.

AU - Bedding, T.R.

AU - Bruntt, Hans

AU - Campante, T.L.

AU - Elsworth, Y.

AU - García, R.A.

AU - Handberg, Rasmus

AU - Régulo, C.

AU - Roxburgh, I.W.

AU - Stello, D.

AU - Christensen-Dalsgaard, Jørgen

AU - Gilliland, R.L.

AU - Kawaler, S.D.

AU - Kjeldsen, Hans

AU - Allen, C.

AU - Clarke, B.D.

AU - Girouard, F.R.

PY - 2011/9

Y1 - 2011/9

N2 - 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.

AB - 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.

U2 - 10.1088/2041-8205/738/2/L28

DO - 10.1088/2041-8205/738/2/L28

M3 - Journal article

SN - 2041-8205

VL - 738

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

IS - 2

ER -