Journal
ASTROPHYSICAL JOURNAL
Volume 690, Issue 1, Pages 743-747Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/690/1/743
Keywords
planetary systems; stars: individual (GJ 832)
Categories
Funding
- NSF [AST-9988087]
- NASA [NAG5-12182]
- PPARC [PP/C000552/1]
- ARC [DP0774000]
- Carnegie Institution of Washington
- Anglo-Australian Observatory
- STFC [ST/G002622/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G002622/1] Funding Source: researchfish
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Precision Doppler velocity measurements from the Anglo-Australian Telescope reveal a planet with a 9.4 +/- 0.4 year period orbiting the M1.5 dwarf GJ 832. Within measurement uncertainty the orbit is circular, and the minimum mass (m sin i) of the planet is 0.64 +/- 0.06 M(JUP). GJ 832 appears to be depleted in metals by at least 50% relative to the Sun, as are a significant fraction of the M dwarfs known to host exoplanets. GJ 832 adds another Jupiter-mass planet to the known census of M dwarf exoplanets, which currently includes a significant number of Neptune-mass planets. GJ 832 is an excellent candidate for astrometric orbit determination with alpha sin i = 0.95 mas. GJ 832b has the second largest angular distance from its star among radial velocity detected exoplanets (0.69 arcsec) making it a potentially interesting target for future direct detection.
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