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GJ 832c: A super-earth in the habitable zone

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  • Robert A. Wittenmyer
  • Mikko Tuomi
  • R. P. Butler
  • Hugh Jones
  • Guillem Anglada-Escudé
  • Jonathan Horner
  • C. G. Tinney
  • J. P. Marshall
  • B. D. Carter
  • J. Bailey
  • G. S. Salter
  • S. J. O'Toole
  • D. Wright
  • J. D. Crane
  • S. A. Schectman
  • P. Arriagada
  • I. Thompson
  • D. Minniti
  • J. S. Jenkins
  • M. Diaz
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Original languageEnglish
Article number114
JournalThe Astrophysical Journal
Publication statusPublished - 5 Aug 2014


We report the detection of GJ 832c, a super-Earth orbiting near the inner edge of the habitable zone of GJ 832, an M dwarf previously known to host a Jupiter analog in a nearly circular 9.4 yr orbit. The combination of precise radial-velocity measurements from three telescopes reveals the presence of a planet with a period of 35.68 ± 0.03 days and minimum mass (m sin i) of 5.4 ± 1.0 Earth masses. GJ 832c moves on a low-eccentricity orbit (e = 0.18 ± 0.13) toward the inner edge of the habitable zone. However, given the large mass of the planet, it seems likely that it would possess a massive atmosphere, which may well render the planet inhospitable. Indeed, it is perhaps more likely that GJ 832c is a "super-Venus," featuring significant greenhouse forcing. With an outer giant planet and an interior, potentially rocky planet, the GJ 832 planetary system can be thought of as a miniature version of our own solar system.


Robert A. Wittenmyer, et al., 'GJ832c: A super-Earth in the habitable zone', The Astrophysical Journal, Vol. 791 (2), first published 5 August 2014. The version of record is available at doi: © 2014. The American Astronomical Society. All rights reserved.

ID: 11128567