A System of Three Super Earths Transiting the Late K-Dwarf GJ 9827 at 30 pc
Author(s)
Rodriguez, Joseph E.; Vanderburg, Andrew; Eastman, Jason D.; Mann, Andrew W.; Crossfield, Ian J. M.; Ciardi, David R.; Latham, David W.; Quinn, Samuel N.; ... Show more Show less
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We report the discovery of three small transiting planets orbiting GJ 9827, a bright (K = 7.2) nearby late K-type dwarf star. GJ 9827 hosts a 1.62 ± 0.11 R⊕ super Earth on a 1.2 day period, 1.269[subscript -00.089][superscript +0.087] R⊕ a super Earth on a 3.6 day period, and a 2.07 ± 0.14 R⊕ super Earth on a 6.2 day period. The radii of the planets transiting GJ 9827 span the transition between predominantly rocky and gaseous planets, and GJ 9827 b and c fall in or close to the known gap in the radius distribution of small planets between these populations. At a distance of 30 pc, GJ 9827 is the closest exoplanet host discovered by K2 to date, making these planets well-suited for atmospheric studies with the upcoming James Webb Space Telescope. The GJ 9827 system provides a valuable opportunity to characterize interior structure and atmospheric properties of coeval planets spanning the rocky to gaseous transition.
Date issued
2018-01Department
Massachusetts Institute of Technology. Department of PhysicsJournal
Astronomical Journal
Publisher
American Astronomical Society
Citation
Rodriguez, Joseph E. et al. “A System of Three Super Earths Transiting the Late K-Dwarf GJ 9827 at 30 pc.” The Astronomical Journal 155, 2 (January 2018): 72. © 2018 The American Astronomical Society
Version: Final published version
ISSN
1538-3881
0004-6256