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Multiplicity of Herbig Ae/Be Stars

Published online by Cambridge University Press:  12 July 2007

Sandrine J. Thomas
Affiliation:
LAO, UCO/Lick Observatory, 1156 High Street, Santa Cruz, CA 95064, USA. email: sthomas@ucolick.org NOAO/CTIO, Casilla 603, La Serena, Chile email: nvdbliek@ctio.noao.edu
Nicole S. van der Bliek
Affiliation:
NOAO/CTIO, Casilla 603, La Serena, Chile email: nvdbliek@ctio.noao.edu
Bernadette Rodgers
Affiliation:
Gemini Observatory, Casilla 603, La Serena, Chile email: brodgers@gemini.edu, gdoppmann@gemini.edu
Greg Doppmann
Affiliation:
Gemini Observatory, Casilla 603, La Serena, Chile email: brodgers@gemini.edu, gdoppmann@gemini.edu
Jérôme Bouvier
Affiliation:
University of Grenoble, BP53, F 38041, Grenoble, Cedex 9, France email: Jerome.Bouvier@obs.ujf-grenoble.fr
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Abstract

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One of the most interesting constraints on star formation models comes from the study of multiplicity of young stars as a function of mass. While multiplicity studies of low-mass T Tauri stars have been quite exhaustive, an unbiased and systematic investigation of multiplicity among intermediate-mass Herbig Ae/Be (HAEBE) stars is still lacking. We are therefore conducting a photometric and spectroscopic survey of HAEBE stars to detect companions, establish their physical association with the primary and investigate their properties. The frequency and degree of multiplicity of HAEBE systems will provide new constraints on their formation mechanisms. In this paper we present preliminary results of the high resolution imaging part of the survey, carried out with the adaptive optics system Altair-NIRI on Gemini North. Of 72 stars observed, we find 44 possible binaries or multiples, including at least 25 not previously known.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

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