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Debris Disks and Multiplicity within the 75pc Volume-limited A-Star (VAST) Survey

Published online by Cambridge University Press:  06 January 2014

R. J. De Rosa ,
B. Smith ,
J. Bulger ,
J. Patience ,
C. Marois ,
I. Song ,
B. Macintosh ,
J. Graham ,
R. Doyon  and
M. Bessell
R. J. De Rosa
Affiliation:
School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287-1404, USA email: rjderosa@asu.edu College of Engineering, Mathematics and Physical Sciences, University of Exeter, UK
B. Smith
Affiliation:
School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287-1404, USA email: rjderosa@asu.edu
J. Bulger
Affiliation:
College of Engineering, Mathematics and Physical Sciences, University of Exeter, UK
J. Patience
Affiliation:
School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287-1404, USA email: rjderosa@asu.edu College of Engineering, Mathematics and Physical Sciences, University of Exeter, UK
C. Marois
Affiliation:
NRC Herzberg Institute of Astrophysics, Canada
I. Song
Affiliation:
Physics and Astronomy, University of Georgia, USA
B. Macintosh
Affiliation:
Institute of Geophysics and Planetary Physics, Lawrence Livermore National Lab, USA
J. Graham
Affiliation:
Department of Astronomy, University of California at Berkeley, USA
R. Doyon
Affiliation:
Département de Physique, Université de Montréal, Canada
M. Bessell
Affiliation:
Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Australia
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Abstract

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We present the preliminary findings of an investigation of the multiplicity of debris disk stars identified within our Volume-limited A-star (VAST) multiplicity survey. Previous studies have produced conflicting results regarding the multiplicity fraction of debris disk-hosting stars compared with non-excess stars. By combining our large-scale volume-limited AO survey of A-type stars with the all-sky WISE catalogue, we have investigated the frequency of binary companions to a large sample of A-type stars with and without measured 22μm excess. The results of this study will allow for a greater understanding of the interaction between a companion star and a circumstellar debris disk, informing future study into the formation and stability of planetary-mass companions within binary systems.

Keywords

stars: circumstellar matterstars: binaries: visualstars: early-type
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S299: Exploring the Formation and Evolution of Planetary Systems , June 2013 , pp. 334 - 335
Copyright
Copyright © International Astronomical Union 2013 

References

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