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Three Super-Earths Transiting the Nearby Star GJ 9827

Niraula, Prajwal ; Redfield, Seth ; Dai, Fei ; Barragán, Oscar ; Gandolfi, Davide ; Cauley, P. Wilson ; Hirano, Teruyuki ; Korth, Judith LU ; Smith, Alexis M.S. and Prieto-Arranz, Jorge , et al. (2017) In Astronomical Journal 154(6).
Abstract

We report on the discovery of three transiting planets around GJ 9827. The planets have radii of 1.75±0.18, 1.36±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±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 analysis shows... (More)

We report on the discovery of three transiting planets around GJ 9827. The planets have radii of 1.75±0.18, 1.36±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±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 analysis shows that GJ 9827 planets are excellent candidates for atmospheric observations. Besides, the planetary radii span both sides of the rocky and gaseous divide, hence the system will be an asset in expanding our understanding of the threshold.

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publishing date
type
Contribution to journal
publication status
published
keywords
planets and satellites: detection, stars: individual (GJ 9827, K2-135)
in
Astronomical Journal
volume
154
issue
6
article number
266
publisher
IOP Publishing
external identifiers
  • scopus:85039160035
ISSN
0004-6256
DOI
10.3847/1538-3881/aa957c
language
English
LU publication?
no
id
fe802cd2-a33a-4e16-bb4e-cfd458f49051
date added to LUP
2023-02-02 12:46:30
date last changed
2023-02-20 16:24:45
@article{fe802cd2-a33a-4e16-bb4e-cfd458f49051,
  abstract     = {{<p>We report on the discovery of three transiting planets around GJ 9827. The planets have radii of 1.75±0.18, 1.36±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±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 analysis shows that GJ 9827 planets are excellent candidates for atmospheric observations. Besides, the planetary radii span both sides of the rocky and gaseous divide, hence the system will be an asset in expanding our understanding of the threshold.</p>}},
  author       = {{Niraula, Prajwal and Redfield, Seth and Dai, Fei and Barragán, Oscar and Gandolfi, Davide and Cauley, P. Wilson and Hirano, Teruyuki and Korth, Judith and Smith, Alexis M.S. and Prieto-Arranz, Jorge and Grziwa, Sascha and Fridlund, Malcolm and Persson, Carina M. and Justesen, Anders Bo and Winn, Joshua N. and Albrecht, Simon and Cochran, William D. and Csizmadia, Szilard and Duvvuri, Girish M. and Endl, Michael and Hatzes, Artie P. and Livingston, John H. and Narita, Norio and Nespral, David and Nowak, Grzegorz and Patzold, Martin and Palle, Enric and Van Eylen, Vincent}},
  issn         = {{0004-6256}},
  keywords     = {{planets and satellites: detection; stars: individual (GJ 9827, K2-135)}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{IOP Publishing}},
  series       = {{Astronomical Journal}},
  title        = {{Three Super-Earths Transiting the Nearby Star GJ 9827}},
  url          = {{http://dx.doi.org/10.3847/1538-3881/aa957c}},
  doi          = {{10.3847/1538-3881/aa957c}},
  volume       = {{154}},
  year         = {{2017}},
}