Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101..214m&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 101, Jan. 1991, p. 214-219.
Astronomy and Astrophysics
Astronomy
24
Companion Stars, Double Stars, Dwarf Stars, Infrared Imagery, M Stars, Stellar Mass, Speckle Interferometry, Stellar Orbits, Stellar Spectrophotometry, Stellar Systems
Scientific paper
Two-dimensional infrared imaging of the double star Gliese 22AB at H (1.6 micron) and K (2.2 microns) has directly detected the low-mass, astrometric component Gliese 22C. The M dwarf primary, GL 22A, was reported to be an astrometric binary by Hershey (1973); here, the first image of the astrometric companion is provided, at a separation of 0.5 arcsec, and the masses of GL 22AC are determined to be 0.36 and 0.12 solar mass. From its infrared flux, GL 22B is estimated to have a mass of 0.18 solar mass. The system is now known to contain a primary orbited by two similar secondaries in what appear to be nearly coplanar, circular, corevolving orbits at distances of 5 and 40 AU, similar to the scale and orbital mechanics of the solar system.
Christou Julian C.
Henry Todd J.
McCarthy Donald W. Jr.
McLeod Brian
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