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29 March 2024
 
  » arxiv » 1102.0605

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KEPLER's First Rocky Planet: Kepler-10b
Natalie M. Batalha ; William J. Borucki ; Stephen T. Bryson ; Lars A. Buchhave ; Douglas A. Caldwell ; Jorgen Christensen-Dalsgaard ; David Ciardi ; Edward W. Dunham ; Francois Fressin ; Thomas N. Gautier III ; Ronald L. Gilliland ; Michael R. Haas ; Steve B. Howell ; Jon M. Jenkins ; Hans Kjeldsen ; David G. Koch ; David W. Latham ; Jack J. Lissauer ; Geoffrey W. Marcy ; Jason F. Rowe ; Dimitar D. Sasselov ; Sara Seager ; Jason H. Steffen ; Guillermo Torres ; Gibor S. Basri ; Timothy M. Brown ; David Charbonneau ; Jessie Christiansen ; Bruce Clarke ; William D. Cochran ; Andrea Dupree ; Daniel C. Fabrycky ; Debra Fischer ; Eric B. Ford ; Jonathan Fortney ; Forrest R. Girouard ; Matthew J. Holman ; John Johnson ; Howard Isaacson ; Todd C. Klaus ; Pavel Machalek ; Althea V. Moorehead ; Robert C. Morehead ; Darin Ragozzine ; Peter Tenenbaum ; Joseph Twicken ; Samuel Quinn ; Jeffrey VanCleve ; Lucianne M. Walkowicz ; William F. Welsh ; Edna Devore ; Alan Gould ;
Date 3 Feb 2011
AbstractNASA’s Kepler Mission uses transit photometry to determine the frequency of earth-size planets in or near the habitable zone of Sun-like stars. The mission reached a milestone toward meeting that goal: the discovery of its first rocky planet, Kepler-10b. Two distinct sets of transit events were detected: 1) a 152 +/- 4 ppm dimming lasting 1.811 +/- 0.024 hours with ephemeris T[BJD]=2454964.57375+N*0.837495 days and 2) a 376 +/- 9 ppm dimming lasting 6.86 +/- 0.07 hours with ephemeris T[BJD]=2454971.6761+N*45.29485 days. Statistical tests on the photometric and pixel flux time series established the viability of the planet candidates triggering ground-based follow-up observations. Forty precision Doppler measurements were used to confirm that the short-period transit event is due to a planetary companion. The parent star is bright enough for asteroseismic analysis. Photometry was collected at 1-minute cadence for >4 months from which we detected 19 distinct pulsation frequencies. Modeling the frequencies resulted in precise knowledge of the fundamental stellar properties. Kepler-10 is a relatively old (11.9 +/- 4.5 Gyr) but otherwise Sun-like Main Sequence star with Teff=5627 +/- 44 K, Mstar=0.895 +/- 0.060 Msun, and Rstar=1.056 +/- 0.021 Rsun. Physical models simultaneously fit to the transit light curves and the precision Doppler measurements yielded tight constraints on the properties of Kepler-10b that speak to its rocky composition: Mpl=4.56 +/- 1.29 Mearth, Rpl=1.416 +/- 0.036 Rearth, and density=8.8 +/- 2.9 gcc. Kepler-10b is the smallest transiting exoplanet discovered to date.
Source arXiv, 1102.0605
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