ICCD speckle observations of binary stars. I - A survey for duplicity among the bright stars

• DOI: 10.1086/114297
• Publication Date: 2002-07-26T17:55:45Z
• Authors: Harold A. McAlister; William I. Hartkopf; Donald J. Hutter; Michael M. Shara; Otto G. Franz
• Keywords: Speckle imaging; Visual binary

A survey of a sample 672 stars from the Yale Bright Star Catalog (Hoffleit, 1982) has been carried out using speckle interferometry on 3.6-cm Canada-France-Hawaii Telescope in order to establish binary star frequency within sample. This effort was motivated by need for more observationally determined basis predicting failure Hubble Space (HST) fine-guidance sensors achieve guide-star lock due duplicity. 426 dwarfs and 246 evolved yielded measurements 52 newly discovered binaries 60 previously known systems. It is shown that close visual separation range 0.04-0.25 arcsec 11 percent, or nearly 3.5 times known.