Published in
American Astronomical Society, Astrophysical Journal, 2(791), p. 114, 2014
DOI: 10.1088/0004-637x/791/2/114
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GJ 832c: A super-earth in the habitable zone
,
Guillem Anglada-Escude,
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
and other authors.
Full text: Download
Abstract
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-year 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) towards 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. ; Comment: Accepted for publication in ApJ