Direct infrared observations of the very low mass object Gliese 623B

Details Direct infrared observations of the very low mass object Gliese 623B Direct infrared observations of the very low mass object Gliese 623B

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...319l..93m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 319, Aug. 15, 1987, p. L93-L98.

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17

Binary Stars, Infrared Astronomy, Mass To Light Ratios, Stellar Evolution, Stellar Luminosity, Computational Astrophysics, Infrared Sources (Astronomy), Interferometry, Radial Velocity

Scientific paper

A low-mass, probably stellar, companion to the nearby star Gliese 623 has been detected interferometrically at 1.25, 1.65, and 2.2 microns, and its motion has been monitored over more than one full revolution cycle. Detection of this companion confirms a low-amplitude perturbation of the photocenter indicated previously by extensive astrometric observations. The interferometry, together with available astrometric and radial velocity measurements, yields improved orbital elements and the first photometric measurements and mass determinations of the component stars. The indicated luminosity and mass of G1 623B appear inconsistent with stellar models which predict a rapid decline of luminosity with decreasing mass for stars of age 2 Gyr and greater.

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