A systematic search for brown dwarfs orbiting nearby stars

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168387· OSTI ID:6851901

Henry, T J; Mccarthy, Jr, D W ^[1]

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1. Steward Observatory, Tucson, AZ (USA)

Survey data for brown dwarf and stellar companions relative to known M dwarf stars within 5 pc north of -30 deg are analyzed. A region 0.2 to 5 arcsec in radius around 27 stars at the IR H and K bands are examined using IR speckle interferometry. The frequency of binary versus single M dwarfs in the solar neighborhood is examined. The IR mass-magnitude relations and mass-luminosity-age relation are studied. The data reveal that there are 19 single M dwarfs, 8 M dwarf binaries, 1 M dwarf triple system, and 1 M dwarf in a triple system for M dwarfs within 5 pc north of -30 deg. Also of the 27 M dwarfs studied none was found to have a brown dwarf companion. 64 refs.

• OSTI ID: 6851901
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 350; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
BLACKBODY RADIATION
DETECTION
DWARF STARS
ELECTROMAGNETIC RADIATION
INTERFEROMETRY
LUMINOSITY
MASS
OPTICAL PROPERTIES
ORBITS
PHYSICAL PROPERTIES
RADIATIONS
SPECTROPHOTOMETRY
STAR EVOLUTION
STARS