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Multiplicity of Herbig Ae/Be Stars

Published online by Cambridge University Press:  12 July 2007

Sandrine J. Thomas ,
Nicole S. van der Bliek ,
Bernadette Rodgers ,
Greg Doppmann  and
Jérôme Bouvier
Sandrine J. Thomas
Affiliation:
LAO, UCO/Lick Observatory, 1156 High Street, Santa Cruz, CA 95064, USA. email: [email protected] NOAO/CTIO, Casilla 603, La Serena, Chile email: [email protected]
Nicole S. van der Bliek
Affiliation:
NOAO/CTIO, Casilla 603, La Serena, Chile email: [email protected]
Bernadette Rodgers
Affiliation:
Gemini Observatory, Casilla 603, La Serena, Chile email: [email protected], [email protected]
Greg Doppmann
Affiliation:
Gemini Observatory, Casilla 603, La Serena, Chile email: [email protected], [email protected]
Jérôme Bouvier
Affiliation:
University of Grenoble, BP53, F 38041, Grenoble, Cedex 9, France email: [email protected]
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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.

Keywords

Herbig Ae/Be starsbinariespre-main sequence
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 250 - 253
Copyright
Copyright © International Astronomical Union 2007

References

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