Journal
ASTROPHYSICAL JOURNAL
Volume 800, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/800/1/59
Keywords
planets and satellites: detection; techniques: photometric
Categories
Funding
- NASA [NAS5-26555]
- NASA Office of Space Science [NNX13AC07G]
- NASA Science Mission directorate
- National Aeronautics and Space Administration under the Exoplanet Exploration Program
- National Science Foundation Graduate Research Fellowship [DGE 1144152, DGE 1144469]
- David and Lucile Packard Foundation
- Alfred P. Sloan Foundation
- Fundacao para a Ciencia e a Tecnologia (FCT) through Investigador FCT [IF/01037/2013]
- POPH/FSE (EC) by FEDER through the program Programa Operacional de Factores de Competitividade-COMPETE
- Austrian Science Fund [FWF P22691-N16]
- European Union Seventh Framework Programme (FP7) [313014 (ETAEARTH)]
- John Templeton Foundation
- Prodex program of the Swiss Space Office (SSO)
- Harvard University Origin of Life Initiative (HUOLI)
- Scottish Universities Physics Alliance (SUPA)
- University of Geneva
- Smithsonian Astrophysical Observatory (SAO)
- Italian National Astrophysical Institute (INAF)
- University of St. Andrews
- Queens University Belfast
- University of Edinburgh
- California Institute of Technology
- Inter-University Centre for Astronomy and Astrophysics
- National Science Foundation [AST-0906060, AST-0960343, AST-1207891]
- Mount Cuba Astronomical Foundation
- W.M. Keck Foundation
- UK's Science and Technology Facilities Council (STFC)
- U.S. Government [NAG W-2166]
- National Geographic Society
- National Science Foundation
- Sloan Foundation
- Samuel Oschin Foundation
- Eastman Kodak Corporation
- U.S. Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/NotreDame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- New Mexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- Science and Technology Facilities Council [PP/F000065/1, ST/J001651/1, PP/D000890/1, ST/J000027/1, ST/L000733/1, ST/I001719/1, ST/G001006/1, ST/K006126/1, ST/I000666/1, ST/L00139X/1, ST/M001296/1] Funding Source: researchfish
- STFC [ST/J004626/1, ST/J001651/1, ST/I001719/1, ST/K006126/1, ST/G001006/1, ST/L00139X/1, ST/L000733/1, ST/J000027/1, PP/F000065/1, ST/I000666/1, PP/D000890/1, ST/M001296/1] Funding Source: UKRI
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We report the first planet discovery from the two-wheeled Kepler (K2) mission: HIP 116454 b. The host star HIP 116454 is a bright (V = 10.1, K = 8.0) K1 dwarf with high proper motion and a parallax-based distance of 55.2 +/- 5.4 pc. Based on high-resolution optical spectroscopy, we find that the host star is metal-poor with [Fe/H]= -0.16 +/- 0.08 and has a radius R-star = 0.716 +/- 0.024 R-circle dot and mass M-star = 0.775 +/- 0.027M(circle dot). The star was observed by the Kepler spacecraft during its Two-Wheeled Concept Engineering Test in 2014 February. During the 9 days of observations, K2 observed a single transit event. Using a new K2 photometric analysis technique, we are able to correct small telescope drifts and recover the observed transit at high confidence, corresponding to a planetary radius of R-p = 2.53 +/- 0.18 R-circle plus. Radial velocity observations with the HARPS-N spectrograph reveal a 11.82 +/- 1.33 M-circle plus planet in a 9.1 day orbit, consistent with the transit depth, duration, and ephemeris. Follow-up photometric measurements from the MOST satellite confirm the transit observed in the K2 photometry and provide a refined ephemeris, making HIP 116454 b amenable for future follow-up observations of this latest addition to the growing population of transiting super-Earths around nearby, bright stars.
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