GJ 832c: a super-Earth in the habitable zone




Robert A. Wittenmyer, Mikko Tuomi, R. P. Butler, H. R. A. 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

PublisherIOP PUBLISHING LTD

BRISTOL; TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND

2014

Astrophysical Journal

Astrophysical Journal

Astrophys.J.

114

791

2

11

0004-637X

DOIhttps://doi.org/10.1088/0004-637X/791/2/114



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.



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