On the binary nature of Van Biesbroeck 8

Details On the binary nature of Van Biesbroeck 8 On the binary nature of Van Biesbroeck 8

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312l..27p&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 312, Jan. 1, 1987, p. L27-L30.

Astronomy and Astrophysics

Astronomy

18

Binary Stars, Infrared Astronomy, Red Dwarf Stars, Speckle Interferometry, Brown Dwarf Stars, Constraints, M Stars, Stellar Motions, Visibility

Scientific paper

The authors report observations by infrared speckle interferometry at 2.2 and 3.6 μm of the nearby M dwarf Van Biesbroeck 8. This low-luminosity star has raised much interest since the 1985 discovery by McCarthy and colleagues of a close cool companion (VB 8B) at 1arcsec, presented as the first observational evidence of the existence of brown dwarfs. At the time of the observations reported here, no companion could be detected at a distance greater than 0arcsec.4 (2.5 AU). Constraints on the dynamics of the system are deduced; the nature of VB 8B is discussed and its existence is questioned.

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