Steve B. Howell, Jason F. Rowe, Stephen T. Bryson, Samuel N. Quinn, Geoffrey W. Marcy, Howard Isaacson, David R. Ciardi, William J. Chaplin, Travis S. Metcalfe, Mario J. P. F. G. Monteiro, Thierry Appourchaux, Sarbani Basu, Orlagh L. Creevey, Ronald L. Gilliland, Pierre-Olivier Quirion, Denis Stello, Hans Kjeldsen, Jorgen Christensen-Dalsgaard, Yvonne Elsworth, Rafael A. García, Gunter Houdek, Christoffer Karoff, Joanna Molenda-Żakowicz, Michael J. Thompson, Graham A. Verner, Guillermo Torres, Francois Fressin, Justin R. Crepp, Elisabeth Adams, Andrea Dupree, Dimitar D. Sasselov, Courtney D. Dressing, William J. Borucki, David G. Koch, Jack J. Lissauer, David W. Latham, Thomas N. Gautier III, Mark Everett, Elliott Horch, Natalie M. Batalha, Edward W. Dunham, Paula Szkody, David R. Silva, Ken Mighel, Jay Holberg, Jer^ome Ballot, Timothy R. Bedding, Hans Bruntt, Tiago L. Campante, Rasmus Handberg, Saskia Hekker, Daniel Huber, Savita Mathur, Benoit Mosser, Clara Régulo, Timothy R. White, Jessie L. Christiansen, Christopher K. Middour, Michael R. Haas, Jennifer R. Hall, Jon M. Jenkins, Sean McCaulif, Michael N. Fanelli, Craig Kulesa, Don McCarthy, Christopher E. Henze
We present Kepler observations of the bright (V=8.3), oscillating star HD
179070. The observations show transit-like events which reveal that the star is
orbited every 2.8 days by a small, 1.6 R_Earth object. Seismic studies of HD
179070 using short cadence Kepler observations show that HD 179070 has a
frequencypower spectrum consistent with solar-like oscillations that are
acoustic p-modes. Asteroseismic analysis provides robust values for the mass
and radius of HD 179070, 1.34{\pm}0.06 M{\circ} and 1.86{\pm}0.04 R{\circ}
respectively, as well as yielding an age of 2.84{\pm}0.34 Gyr for this F5
subgiant. Together with ground-based follow-up observations, analysis of the
Kepler light curves and image data, and blend scenario models, we
conservatively show at the >99.7% confidence level (3{\sigma}) that the transit
event is caused by a 1.64{\pm}0.04 R_Earth exoplanet in a 2.785755{\pm}0.000032
day orbit. The exoplanet is only 0.04 AU away from the star and our
spectroscopic observations provide an upper limit to its mass of ~10 M_Earth
(2-{\sigma}). HD 179070 is the brightest exoplanet host star yet discovered by
Kepler.
View original:
http://arxiv.org/abs/1112.2165
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