TY - JOUR
T1 - The low-mass companion of gliese 22A
T2 - First results of the steward observatory infrared speckle camera
AU - McCarthy, D. W.
AU - Henry, Todd J.
AU - McLeod, Brian
AU - Christou, Julian C.
PY - 1991/1
Y1 - 1991/1
N2 - Two-dimensional infrared imaging of the double star Gliese 22AB at H (1.6 μm) and K (2.2 μm) 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); we provide the first image of the astrometric companion, at a separation of 0.5″, and determine the masses of GL 22AC to be 0.36 and 0.12 Script M sign⊙. From its infrared flux, GL 22B is estimated to have a mass of 0.18 Script M sign⊙. 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 our solar system.
AB - Two-dimensional infrared imaging of the double star Gliese 22AB at H (1.6 μm) and K (2.2 μm) 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); we provide the first image of the astrometric companion, at a separation of 0.5″, and determine the masses of GL 22AC to be 0.36 and 0.12 Script M sign⊙. From its infrared flux, GL 22B is estimated to have a mass of 0.18 Script M sign⊙. 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 our solar system.
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U2 - 10.1086/115681
DO - 10.1086/115681
M3 - Article
AN - SCOPUS:0040713318
SN - 0004-6256
VL - 101
SP - 214
EP - 219
JO - Astronomical Journal
JF - Astronomical Journal
IS - 1
ER -