KOI-3158: The oldest known system of terrestrial-size planets

T. L. Campante; T. Barclay; J. J. Swift; D. Huber; V. Zh Adibekyan; W. Cochran; C. J. Burke; H. Isaacson; E. V. Quintana; G. R. Davies; V. Silva Aguirre; D. Ragozzine; R. Riddle; C. Baranec; S. Basu; W. J. Chaplin; J. Christensen-Dalsgaard; T. S. Metcalfe; T. R. Bedding; R. Handberg; D. Stello; J. M. Brewer; S. Hekker; C. Karoff; R. Kolbl; N. M. Law; M. Lundkvist; A. Miglio; J. F. Rowe; N. C. Santos; C. Van Laerhoven; T. Arentoft; Y. P. Elsworth; D. A. Fischer; S. D. Kawaler; H. Kjeldsen; M. N. Lund; G. W. Marcy; S. G. Sousa; A. Sozzetti; T. R. White

doi:10.1051/epjconf/201510102004

KOI-3158: The oldest known system of terrestrial-size planets

T. L. Campante, T. Barclay, J. J. Swift, D. Huber, V. Zh Adibekyan, W. Cochran, C. J. Burke, H. Isaacson, E. V. Quintana, G. R. Davies, V. Silva Aguirre, D. Ragozzine, R. Riddle, C. Baranec, S. Basu, W. J. Chaplin, J. Christensen-Dalsgaard, T. S. Metcalfe, T. R. Bedding, R. HandbergD. Stello, J. M. Brewer, S. Hekker, C. Karoff, R. Kolbl, N. M. Law, M. Lundkvist, A. Miglio, J. F. Rowe, N. C. Santos, C. Van Laerhoven, T. Arentoft, Y. P. Elsworth, D. A. Fischer, S. D. Kawaler, H. Kjeldsen, M. N. Lund, G. W. Marcy, S. G. Sousa, A. Sozzetti, T. R. White

Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

The first discoveries of exoplanets around Sun-like stars have fueled efforts to find ever smaller worlds evocative of Earth and other terrestrial planets in the Solar System. While gas-giant planets appear to form preferentially around metal-rich stars, small planets (with radii less than four Earth radii) can form under a wide range of metallicities. This implies that small, including Earth-size, planets may have readily formed at earlier epochs in the Universe's history when metals were far less abundant. We report Kepler spacecraft observations of KOI-3158, a metal-poor Sun-like star from the old population of the Galactic thick disk, which hosts five planets with sizes between Mercury and Venus. We used asteroseismology to directly measure a precise age of 11.2 ± 1.0 Gyr for the host star, indicating that KOI-3158 formed when the Universe was less than 20 % of its current age and making it the oldest known system of terrestrial-size planets. We thus show that Earth-size planets have formed throughout most of the Universe's 13.8-billion-year history, providing scope for the existence of ancient life in the Galaxy.

Original language	English
Article number	02004
Journal	EPJ Web of Conferences
Volume	101
DOIs	https://doi.org/10.1051/epjconf/201510102004
Publication status	Published - 23 Sept 2015
Event	CoRoT Symposium 3, Kepler KASC-7 Joint Meeting on Space Photometry Revolution - Toulouse, France Duration: 6 Jul 2014 → 11 Jul 2014

Bibliographical note

Publisher Copyright:
© Owned by the authors, published by EDP Sciences, 2015.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1051/epjconf/201510102004

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Campante, T. L., Barclay, T., Swift, J. J., Huber, D., Adibekyan, V. Z., Cochran, W., Burke, C. J., Isaacson, H., Quintana, E. V., Davies, G. R., Silva Aguirre, V., Ragozzine, D., Riddle, R., Baranec, C., Basu, S., Chaplin, W. J., Christensen-Dalsgaard, J., Metcalfe, T. S., Bedding, T. R., ... White, T. R. (2015). KOI-3158: The oldest known system of terrestrial-size planets. EPJ Web of Conferences, 101, Article 02004. https://doi.org/10.1051/epjconf/201510102004

@article{2c4412ca62a546ec9fed6b3ddbef651f,

title = "KOI-3158: The oldest known system of terrestrial-size planets",

abstract = "The first discoveries of exoplanets around Sun-like stars have fueled efforts to find ever smaller worlds evocative of Earth and other terrestrial planets in the Solar System. While gas-giant planets appear to form preferentially around metal-rich stars, small planets (with radii less than four Earth radii) can form under a wide range of metallicities. This implies that small, including Earth-size, planets may have readily formed at earlier epochs in the Universe's history when metals were far less abundant. We report Kepler spacecraft observations of KOI-3158, a metal-poor Sun-like star from the old population of the Galactic thick disk, which hosts five planets with sizes between Mercury and Venus. We used asteroseismology to directly measure a precise age of 11.2 ± 1.0 Gyr for the host star, indicating that KOI-3158 formed when the Universe was less than 20 % of its current age and making it the oldest known system of terrestrial-size planets. We thus show that Earth-size planets have formed throughout most of the Universe's 13.8-billion-year history, providing scope for the existence of ancient life in the Galaxy.",

author = "Campante, {T. L.} and T. Barclay and Swift, {J. J.} and D. Huber and Adibekyan, {V. Zh} and W. Cochran and Burke, {C. J.} and H. Isaacson and Quintana, {E. V.} and Davies, {G. R.} and {Silva Aguirre}, V. and D. Ragozzine and R. Riddle and C. Baranec and S. Basu and Chaplin, {W. J.} and J. Christensen-Dalsgaard and Metcalfe, {T. S.} and Bedding, {T. R.} and R. Handberg and D. Stello and Brewer, {J. M.} and S. Hekker and C. Karoff and R. Kolbl and Law, {N. M.} and M. Lundkvist and A. Miglio and Rowe, {J. F.} and Santos, {N. C.} and {Van Laerhoven}, C. and T. Arentoft and Elsworth, {Y. P.} and Fischer, {D. A.} and Kawaler, {S. D.} and H. Kjeldsen and Lund, {M. N.} and Marcy, {G. W.} and Sousa, {S. G.} and A. Sozzetti and White, {T. R.}",

note = "Publisher Copyright: {\textcopyright} Owned by the authors, published by EDP Sciences, 2015.; CoRoT Symposium 3, Kepler KASC-7 Joint Meeting on Space Photometry Revolution ; Conference date: 06-07-2014 Through 11-07-2014",

year = "2015",

month = sep,

day = "23",

doi = "10.1051/epjconf/201510102004",

language = "English",

volume = "101",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

publisher = "EDP Sciences",

}

Campante, TL, Barclay, T, Swift, JJ, Huber, D, Adibekyan, VZ, Cochran, W, Burke, CJ, Isaacson, H, Quintana, EV, Davies, GR, Silva Aguirre, V, Ragozzine, D, Riddle, R, Baranec, C, Basu, S, Chaplin, WJ, Christensen-Dalsgaard, J, Metcalfe, TS, Bedding, TR, Handberg, R, Stello, D, Brewer, JM, Hekker, S, Karoff, C, Kolbl, R, Law, NM, Lundkvist, M, Miglio, A, Rowe, JF, Santos, NC, Van Laerhoven, C, Arentoft, T, Elsworth, YP, Fischer, DA, Kawaler, SD, Kjeldsen, H, Lund, MN, Marcy, GW, Sousa, SG, Sozzetti, A & White, TR 2015, 'KOI-3158: The oldest known system of terrestrial-size planets', EPJ Web of Conferences, vol. 101, 02004. https://doi.org/10.1051/epjconf/201510102004

TY - JOUR

T1 - KOI-3158

T2 - CoRoT Symposium 3, Kepler KASC-7 Joint Meeting on Space Photometry Revolution

AU - Campante, T. L.

AU - Barclay, T.

AU - Swift, J. J.

AU - Huber, D.

AU - Adibekyan, V. Zh

AU - Cochran, W.

AU - Burke, C. J.

AU - Isaacson, H.

AU - Quintana, E. V.

AU - Davies, G. R.

AU - Silva Aguirre, V.

AU - Ragozzine, D.

AU - Riddle, R.

AU - Baranec, C.

AU - Basu, S.

AU - Chaplin, W. J.

AU - Christensen-Dalsgaard, J.

AU - Metcalfe, T. S.

AU - Bedding, T. R.

AU - Handberg, R.

AU - Stello, D.

AU - Brewer, J. M.

AU - Hekker, S.

AU - Karoff, C.

AU - Kolbl, R.

AU - Law, N. M.

AU - Lundkvist, M.

AU - Miglio, A.

AU - Rowe, J. F.

AU - Santos, N. C.

AU - Van Laerhoven, C.

AU - Arentoft, T.

AU - Elsworth, Y. P.

AU - Fischer, D. A.

AU - Kawaler, S. D.

AU - Kjeldsen, H.

AU - Lund, M. N.

AU - Marcy, G. W.

AU - Sousa, S. G.

AU - Sozzetti, A.

AU - White, T. R.

PY - 2015/9/23

Y1 - 2015/9/23

N2 - The first discoveries of exoplanets around Sun-like stars have fueled efforts to find ever smaller worlds evocative of Earth and other terrestrial planets in the Solar System. While gas-giant planets appear to form preferentially around metal-rich stars, small planets (with radii less than four Earth radii) can form under a wide range of metallicities. This implies that small, including Earth-size, planets may have readily formed at earlier epochs in the Universe's history when metals were far less abundant. We report Kepler spacecraft observations of KOI-3158, a metal-poor Sun-like star from the old population of the Galactic thick disk, which hosts five planets with sizes between Mercury and Venus. We used asteroseismology to directly measure a precise age of 11.2 ± 1.0 Gyr for the host star, indicating that KOI-3158 formed when the Universe was less than 20 % of its current age and making it the oldest known system of terrestrial-size planets. We thus show that Earth-size planets have formed throughout most of the Universe's 13.8-billion-year history, providing scope for the existence of ancient life in the Galaxy.

AB - The first discoveries of exoplanets around Sun-like stars have fueled efforts to find ever smaller worlds evocative of Earth and other terrestrial planets in the Solar System. While gas-giant planets appear to form preferentially around metal-rich stars, small planets (with radii less than four Earth radii) can form under a wide range of metallicities. This implies that small, including Earth-size, planets may have readily formed at earlier epochs in the Universe's history when metals were far less abundant. We report Kepler spacecraft observations of KOI-3158, a metal-poor Sun-like star from the old population of the Galactic thick disk, which hosts five planets with sizes between Mercury and Venus. We used asteroseismology to directly measure a precise age of 11.2 ± 1.0 Gyr for the host star, indicating that KOI-3158 formed when the Universe was less than 20 % of its current age and making it the oldest known system of terrestrial-size planets. We thus show that Earth-size planets have formed throughout most of the Universe's 13.8-billion-year history, providing scope for the existence of ancient life in the Galaxy.

UR - http://www.scopus.com/inward/record.url?scp=84960145512&partnerID=8YFLogxK

U2 - 10.1051/epjconf/201510102004

DO - 10.1051/epjconf/201510102004

M3 - Conference article

AN - SCOPUS:84960145512

SN - 2101-6275

VL - 101

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 02004

Y2 - 6 July 2014 through 11 July 2014

ER -

KOI-3158: The oldest known system of terrestrial-size planets

Abstract

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