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

D. W. McCarthy, Todd J. Henry, Brian McLeod, Julian C. Christou

Research output: Contribution to journalArticle

21 Scopus citations

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
DOIs
StatePublished - Jan 1991

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'The low-mass companion of gliese 22A: First results of the steward observatory infrared speckle camera'. Together they form a unique fingerprint.

  • Cite this