A near-infrared, wide-field, proper-motion search for brown dwarfs

Joannah L. Hinz, Donald W. McCarthy, Doug A. Simons, Todd J. Henry, J. Davy Kirkpatrick, Patrick C. McGuire

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


A common proper-motion survey of M dwarf stars within 8 pc of the Sun reveals no new stellar or brown dwarf companions at wide separations (∼100-1400 AU). This survey tests whether the brown dwarf "desert" extends to large separations around M dwarf stars and further explores the census of the solar neighborhood. The sample includes 66 stars north of -30° and within 8 pc of the Sun. Existing first-epoch images are compared with new J-band images of the same fields an average of 7 yr later to reveal proper-motion companions within a ∼4′ radius of the primary star. No new companions are detected to a J-band limiting magnitude of ∼16.5, corresponding to a companion mass of ∼40 Jupiter masses for an assumed age of 5 Gyr at the mean distance of the objects in the survey, 5.8 pc.

Original languageEnglish (US)
Pages (from-to)2027-2032
Number of pages6
JournalAstronomical Journal
Issue number4 1756
StatePublished - Apr 2002


  • Stars: imaging
  • Stars: low-mass, brown dwarfs
  • Stars: statistics

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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