Kepler-22b: a 2.4 earth-radius planet in the habitable zone of a sun-like star
Article
Article Title | Kepler-22b: a 2.4 earth-radius planet in the habitable zone of a sun-like star |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Borucki, William J. (Author), Koch, David G. (Author), Batalha, Natalie (Author), Bryson, Stephen T. (Author), Rowe, Jason (Author), Fressin, Francois (Author), Torres, Guillermo (Author), Caldwell, Douglas A. (Author), Christensen-Dalsgaard, Jorgen (Author), Cochran, William D. (Author), DeVore, Edna (Author), Gautier, Thomas N. (Author), Geary, John C. (Author), Gilliland, Ronald (Author), Gould, Alan (Author), Howell, Steve B. (Author), Jenkins, Jon M. (Author), Latham, David W. (Author), Lissauer, Jack J. (Author), Marcy, Geoffrey W. (Author), Sasselov, Dimitar (Author), Boss, Alan (Author), Charbonneau, David (Author), Ciardi, David (Author), Kaltenegger, Lisa (Author), Doyle, Laurance (Author), Dupree, Andrea K. (Author), Ford, Eric B. (Author), Fortney, Jonathan (Author), Holman, Matthew J. (Author), Steffen, Jason H. (Author), Mullally, Fergal (Author), Still, Martin (Author), Tarter, Jill (Author), Ballard, Sarah (Author), Buchhave, Lars A. (Author), Carter, Josh (Author), Christiansen, Jessie L. (Author), Demory, Brice Olivier (Author), Desert, Jean Michel (Author), Dressing, Courtney (Author), Endl, Michael (Author), Fabrycky, Daniel (Author), Fischer, Debra (Author), Haas, Michael R. (Author), Henze, Christopher (Author), Horch, Elliott (Author), Howard, Andrew W. (Author), Isaacson, Howard (Author), Kjeldsen, Hans (Author), Johnson, John Asher (Author), Klaus, Todd (Author), Kolodziejczak, Jeffery (Author), Barclay, Thomas (Author), Li, Jie (Author), Meibom, Soren (Author), Prsa, Andrej (Author), Quinn, Samuel N. (Author), Quintana, Elisa V. (Author), Robertson, Paul (Author), Sherry, William (Author), Shporer, Avi (Author), Tenenbaum, Peter (Author), Thompson, Susan E. (Author), Twicken, Joseph D. (Author), Van Cleve, Jeffrey (Author), Welsh, William F. (Author), Basu, Sarbani (Author), Chaplin, William (Author), Miglio, Andrea (Author), Kawaler, Steven D. (Author), Arentoft, Torben (Author), Stello, Dennis (Author), Metcalfe, Travis S. (Author), Verner, Graham A. (Author), Karoff, Christoffer (Author), Lundkvist, Mia (Author), Lund, Mikkel N. (Author), Handberg, Rasmus (Author), Elsworth, Yvonne (Author), Hekker, Saskia (Author), Huber, Daniel (Author), Bedding, Timothy R. (Author) and Rapin, William (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 745 (2), pp. 120-135 |
Article Number | 120 |
Number of Pages | 16 |
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/745/2/120 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/745/2/120 |
Abstract | A search of the time-series photometry from NASA's Kepler spacecraft reveals a transiting planet candidate orbiting the 11th magnitude G5 dwarf KIC 10593626 with a period of 290 days. The characteristics of the host star are well constrained by high-resolution spectroscopy combined with an asteroseismic analysis of the Kepler photometry, leading to an estimated mass and radius of 0.970 0.060 M and 0.979 0.020 R. The depth of 492 10 ppm for the three observed transits yields a radius of 2.38 0.13 Re for the planet. The system passes a battery of tests for false positives, including reconnaissance spectroscopy, high-resolution imaging, and centroid motion. A full BLENDER analysis provides further validation of the planet interpretation by showing that contamination of the target by an eclipsing system would rarely mimic the observed shape of the transits. The final validation of the planet is provided by 16 radial velocities (RVs) obtained with the High Resolution Echelle Spectrometer on Keck I over a one-year span. Although the velocities do not lead to a reliable orbit and mass determination, they are able to constrain the mass to a 3σ upper limit of 124 M ⊕, safely in the regime of planetary masses, thus earning the designation Kepler-22b. The radiative equilibrium temperature is 262 K for a planet in Kepler-22b's orbit. Although there is no evidence that Kepler-22b is a rocky planet, it is the first confirmed planet with a measured radius to orbit in the habitable zone of any star other than the Sun. |
Keywords | planetary systems; stars; Kepler-22; KIC 10593626 |
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 | NASA Ames Research Center, United States |
San Jose University, United States | |
SETI Institute, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Aarhus University, Denmark | |
University of Texas at Austin, United States | |
California Institute of Technology (Caltech), United States | |
Space Telescope Science Institute, United States | |
University of California, United States | |
National Aeronautics and Space Administration (NASA), United States | |
Carnegie Institution of Washington, United States | |
Max Planck Society, Germany | |
University of Florida, United States | |
Fermilab Cosmic Physics Centre, United States | |
Bay Area Environmental Research Institute, United States | |
University of Copenhagen, Denmark | |
Massachusetts Institute of Technology, United States | |
Massey University, New Zealand | |
Southern Connecticut State University, United States | |
Marshall Space Flight Centre, United States | |
Villanova University, United States | |
National Optical Astronomy Observatory, United States | |
Las Cumbres Observatory, United States | |
San Diego State University, United States | |
Yale University, United States | |
University of Birmingham, United Kingdom | |
Iowa State University, United States | |
University of Sydney | |
White Dwarf Research Corporation, United States | |
Toulouse Space Centre, France |
https://research.usq.edu.au/item/q435x/kepler-22b-a-2-4-earth-radius-planet-in-the-habitable-zone-of-a-sun-like-star
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