A Jupiter-like planet orbiting the nearby M dwarf GJ 832

Jeremy Bailey*, R. Paul Butler, C. G. Tinney, Hugh R A Jones, Simon O'Toole, Brad D. Carter, Geoffrey W. Marcy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

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 (msin 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 αsin 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.

Original languageEnglish
Pages (from-to)743-747
Number of pages5
JournalAstrophysical Journal
Volume690
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • Planetary systems
  • Stars: individual (GJ 832)

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