• DOI:10.3847/1538-3881/aa9be0
Corpus ID: 52971376

The K2-138 System: A Near-resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists

@article{Christiansen2018TheKS,
  title={The K2-138 System: A Near-resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists},
  author={J. Christiansen and I. Crossfield and G. Barentsen and C. Lintott and T. Barclay and B. Simmons and E. Petigura and J. Schlieder and C. Dressing and A. Vanderburg and D. Ciardi and C. Allen and Adam McMaster and G. Miller and Martin Veldthuis and Sarah Allen and Z. Wolfenbarger and B. Cox and Julia Zemiro and A. Howard and J. Livingston and E. Sinukoff and Timothy Catron and A. Grey and Joshua J. E. Kusch and I. Terentev and M. Vale{\vs} and M. H. Kristiansen},
  journal={The Astronomical Journal},
  year={2018},
  volume={155},
  pages={57}
}

J. Christiansen, I. Crossfield, +25 authors M. H. Kristiansen

Published 2018

Physics

The Astronomical Journal

K2-138 is a moderately bright (V = 12.2, K = 10.3) main-sequence K star observed in Campaign 12 of the NASA K2 mission. It hosts five small (1.6–3.3 R⊕) transiting planets in a compact architecture. The periods of the five planets are 2.35, 3.56, 5.40, 8.26, and 12.76 days, forming an unbroken chain of near 3:2 resonances. Although we do not detect the predicted 2–5 minute transit timing variations (TTVs) with the K2 timing precision, they may be observable by higher-cadence observations with… CONTINUE READING

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