Three Super-Earths Transiting the Nearby Star GJ 9827
- Niraula, P.
- Redfield, S.
- Dai, F.
- Barrag\ue1n, O.
- Gandolfi, D.
- Cauley, P.W.
- Hirano, T.
- Korth, J.
- Smith, A. M S
- Prieto-Arranz, J.
- Grziwa, S.
- Fridlund, Malcolm
- Persson, Carina
- Justesen, A.B.
- Winn, J.N.
- Albrecht, S.
- Cochran, William D.
- Csizmadia, S.
- Duvvuri, G.M.
- Endl, M.
- Hatzes, Artie P.
- Livingston, J.H.
- Narita, N.
- Nespral, D.
- Nowak, G.
- Patzold, M.
- Palle, E.
- Van Eylen, V.
DOIAbstract
We report on the discovery of three transiting planets around GJ 9827. The planets have radii of 1.75 \ub1 0.18, 1.36 \ub1 0.14, and 2.11_-0.21^+0.22 R⊕, and periods of 1.20896, 3.6480, and 6.2014 days, respectively. The detection was made in Campaign 12 observations as part of our K2 survey of nearby stars. GJ 9827 is a V = 10.39 mag K6V star at a distance of 30.3 \ub1 1.6 parsecs and the nearest star to be found hosting planets by Kepler and K2. The radial velocity follow-up, high-resolution imaging, and detection of multiple transiting objects near commensurability drastically reduce the false positive probability. The orbital periods of GJ 9827 b, c, and d planets are very close to the 1:3:5 mean motion resonance. Our preliminary analys...
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