AAS 203rd Meeting, January 2004
Session 42 Nearby Stars: Binaries, Theory and the Future
Poster, Tuesday, January 6, 2004, 9:20am-6:30pm, Grand Hall

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[42.04] Binarity and the Fine-Print in the Hipparcos Catalogs: A Revised Distance Scale?, More Binaries in the Solar Neighborhood

R. Olling (USNO/USRA)

We present a new analysis of the astrometric and photometric errors reported in the Hipparcos and Tycho-2 catalogs. We develop new criteria to identify likely binary systems. These systems are probably small delta-m systems that are just unresolved (d<0.1") by Hipparcos.

The astrometry of several astrophysically interesting groups of stars such as Cepheids, red clump stars, and potential SIM/TPF targets are re-analyzed.

The author(s) of this abstract have provided an email address for comments about the abstract: olling@usno.navy.mil

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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.