Speckle Interferometry of Metal-Poor Stars in the Solar Neighborhood. I

Abstract

We report the results of speckle-interferometric observations of 109 high proper-motion metal-poor stars made with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. We resolve eight objects -- G102-20, G191-55, BD+19${}^{\circ }$~1185A, G89-14, G87-45, G87-47, G111-38, and G114-25 -- into individual components and we are the first to astrometrically resolve seven of these stars. New resolved systems included two triple (G111-38, G87-47) and one quadruple (G89-14) star. The ratio of single-to-binary-to-triple-to-quadruple systems among the stars of our sample is equal to 71:28:6:1.

arXiv comment8 pages, 4 figures, accepted to Astrophysical Bulletin

References in corpus (2)

• A CCD Imaging Search for Wide Metal-Poor Binaries
• Kinematics of Nearby Subdwarf Stars

Cited by in corpus (6)

• The statistical properties of stars and their dependence on metallicity: the effects of opacity
• Multiplicity and period distribution of Population II field stars in solar vicinity
• Cool Subdwarf Investigations II: Multiplicity
• Speckle Interferometry of Nearby Multiple Stars: 2007-2019 Positional Measurements and Orbits of Eight Objects
• Speckle Interferometry of Metal-Poor Stars in the Solar Neighborhood.II
• New Lithium Measurements in Metal-Poor Stars