The low-mass companion of gliese 22A: First results of the steward observatory infrared speckle camera

Donald W Mccarthy, Todd J. Henry, Brian McLeod, Julian C. Christou

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish (US)
Pages (from-to)214-219
Number of pages6
JournalAstronomical Journal
Volume101
Issue number1
StatePublished - Jan 1991

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speckle
observatories
observatory
cameras
orbital mechanics
double stars
circular orbits
solar system
mechanics

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

The low-mass companion of gliese 22A : First results of the steward observatory infrared speckle camera. / Mccarthy, Donald W; Henry, Todd J.; McLeod, Brian; Christou, Julian C.

In: Astronomical Journal, Vol. 101, No. 1, 01.1991, p. 214-219.

Research output: Contribution to journalArticle

Mccarthy, Donald W ; Henry, Todd J. ; McLeod, Brian ; Christou, Julian C. / The low-mass companion of gliese 22A : First results of the steward observatory infrared speckle camera. In: Astronomical Journal. 1991 ; Vol. 101, No. 1. pp. 214-219.
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