POSTER PAPER 8.02
An Adaptive Optics Search for Visual Binaries in M 34
Theodore Simon, Gaspard Duchene, Jerome Bouvier
Institute: Institute for Astronomy, University of Hawaii
Institute: Division of Astronomy and Astrophysics, UCLA
Institute: Grenoble Observatory, Joseph Fourier University
Contact Email: simon@ifa.hawaii.edu
Abstract:
We have used the PUEO adaptive optics camera on the Canada--France--Hawaii
Telescope (CFHT) to carry out a search for visual binaries among the
late-type members of the M 34 cluster. Of the 94 stars observed, 17
were resolved into close pairs. The observed separations range
from 0."09 to 6."4, corresponding to 40--3000 AU (the latter
being a safe upper limit for bound solar-type binaries). We carried
out the survey at a single infrared wavelength, in the H band at 1.63
micrometers. Additional color information will be needed to eliminate
field stars and to establish which of the observed doubles are bona
fide physical pairs. If the observed binary candidates are true
companions, the masses we infer for the secondaries range from 0.09
MSun to 1.5 MSun , and the mass ratios, q, range from
0.1 to 1.
Index Keywords: M 34; Adaptive Optics; Binary Stars; Clusters
Previous: Raymond
Next: Huenemoerder
Up: Poster Index
Up: Top Index
Manuscript submitted: 2001-Aug-08
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.