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http://hdl.handle.net/20.500.12386/23837
Titolo: | KOI-3158: The oldest known system of terrestrial-size planets | Autori: | Campante, T. L. Barclay, T. Swift, J. J. Huber, D. Adibekyan, V. Zh. 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. Handberg, R. Stello, D. Brewer, J. M. Hekker, S. Karoff, C. Kolbl, R. Law, N. M. Lundkvist, M. Miglio, A. Rowe, J. F. Santos, N. C. Van Laerhoven, C. Arentoft, T. Elsworth, Y. P. Fischer, D. A. Kawaler, S. D. Kjeldsen, H. Lund, M. N. Marcy, G. W. Sousa, S. G. SOZZETTI, Alessandro White, T. R. |
Data pubblicazione: | 2015 | Rivista: | EPJ WEB OF CONFERENCES | Titolo del volume in cui è pubblicato il poster: | The Space Photometry Revolution - CoRoT Symposium 3, Kepler KASC-7 Joint Meeting | Curatore/i del volume in cui è pubblicato il contributo: | García. R.A.; Ballot, J. | Numero: | 101 | Da pagina:: | 02004 | 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. | Titolo del convegno: | The Space Photometry Revolution - CoRoT Symposium 3, Kepler KASC-7 Joint Meeting | Luogo del convegno: | Toulouse, France | Periodo del convegno: | July 6-11, 2014 | URI: | http://hdl.handle.net/20.500.12386/23837 | URL: | https://www.epj-conferences.org/articles/epjconf/abs/2015/20/epjconf_sphr2014_02004/epjconf_sphr2014_02004.html | ISSN: | 2101-6275 | ISBN: | 9781510813342 | DOI: | 10.1051/epjconf/201510102004 | Bibcode ADS: | 2015EPJWC.10102004C | Fulltext: | open |
È visualizzato nelle collezioni: | 3.01 Contributi in Atti di convegno |
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