KEPLER-21b: a 1.6 REarth planet transiting the bright oscillating F subgiant star HD179070
Article
Article Title | KEPLER-21b: a 1.6 REarth planet transiting the bright oscillating F subgiant star HD179070 |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Howell, Steve B. (Author), Rowe, Jason F. (Author), Bryson, Stephen T. (Author), Quinn, Samuel N. (Author), Marcy, Geoffrey W. (Author), Isaacson, Howard (Author), Ciardi, David R. (Author), Chaplin, William J. (Author), Metcalfe, Travis S. (Author), Monteiro, Mario J. P. F. G. (Author), Appourchaux, Thierry (Author), Basu, Sarbani (Author), Creevey, Orlagh L. (Author), Gilliland, Ronald L. (Author), Quirion, Pierre Olivier (Author), Stello, Denis (Author), Kjeldsen, Hans (Author), Christensen-Dalsgaard, Jorgen (Author), Elsworth, Yvonne (Author), Garcia, Rafael A. (Author), Houdek, Gunter (Author), Karoff, Christoffer (Author), Molenda-Akowicz, Joanna (Author), Thompson, Michael J. (Author), Verner, Graham A. (Author), Torres, Guillermo (Author), Fressin, Francois (Author), Crepp, Justin R. (Author), Adams, Elisabeth (Author), Dupree, Andrea (Author), Sasselov, Dimitar D. (Author), Dressing, Courtney D. (Author), Borucki, William J. (Author), Koch, David G. (Author), Lissauer, Jack J. (Author), Latham, David W. (Author), Buchhave, Lars A. (Author), Gautier, Thomas N. (Author), Everett, Mark (Author), Horch, Elliott (Author), Batalha, Natalie M. (Author), Dunham, Edward W. (Author), Szkody, Paula (Author), Silva, David R. (Author), Mighell, Ken (Author), Holberg, Jay (Author), Ballot, Jerome (Author), Bedding, Timothy R. (Author), Bruntt, Hans (Author), Campante, Tiago L. (Author), Handberg, Rasmus (Author), Hekker, Saskia (Author), Huber, Daniel (Author), Mathur, Savita (Author), Mosser, Benoit (Author), Regulo, Clara (Author), White, Timothy R. (Author), Christiansen, Jessie L. (Author), Middour, Christopher K. (Author), Haas, Michael R. (Author), Hall, Jennifer R. (Author), Jenkins, Jon M. (Author), McCauliff, Sean (Author), Fanelli, Michael N. (Author), Kulesa, Craig (Author), McCarthy, Don (Author) and Henze, Christopher E. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 746 (2), pp. 123-140 |
Article Number | 123 |
Number of Pages | 18 |
Year | 2012 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/746/2/123 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/746/2/123 |
Abstract | We present Kepler observations of the bright (V = 8.3), oscillating star HD179070. The observations show transit-like events which reveal that the star is orbited every 2.8days by a small, 1.6 R Earth object. Seismic studies of HD179070 using short cadence Kepler observations show that HD179070 has a frequency-power spectrum consistent with solar-like oscillations that are acoustic p-modes. Asteroseismic analysis provides robust values for the mass and radius of HD179070, 1.34 ± 0.06 M ⊙ and 1.86 ± 0.04 R ⊙, respectively, as well as yielding an age of 2.84 ± 0.34Gyr 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 (3σ) that the transit event is caused by a 1.64 0.04 R Earth exoplanet in a 2.785755 ± 0.000032day 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 (2σ). HD179070 is the brightest exoplanet host star yet discovered by Kepler. |
Keywords | planetary systems; stars: activity; stars HD 179070; KIC 3632418; stars interiors; late-type stars; magnetic field; oscillations pulsations; photometric |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | National Optical Astronomy Observatory, United States |
NASA Ames Research Center, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of California, United States | |
National Aeronautics and Space Administration (NASA), United States | |
University of Birmingham, United Kingdom | |
National Center for Atmospheric Research, United States | |
University of Porto, Portugal | |
Sorbonne University, France | |
Yale University, United States | |
University of La Laguna, Spain | |
Space Telescope Science Institute, United States | |
Canadian Space Agency, Canada | |
University of Sydney | |
Aarhus University, Denmark | |
University of Vienna, Austria | |
University of Wroclaw, Poland | |
California Institute of Technology (Caltech), United States | |
University of Copenhagen, Denmark | |
Southern Connecticut State University, United States | |
San Jose University, United States | |
Lowell Observatory, United States | |
University of Washington, United States | |
University of Arizona, United States | |
University of Toulouse, France | |
Paris Diderot University, France | |
SETI Institute, United States |
https://research.usq.edu.au/item/q435w/kepler-21b-a-1-6-rearth-planet-transiting-the-bright-oscillating-f-subgiant-star-hd179070
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