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Evidence of a Low-Mass Companion to AB Doradus

Published online by Cambridge University Press:  12 April 2016

J. C. Guirado ,
J. E. Reynolds ,
J.-F. Lestrade ,
R. A. Preston ,
D. L. Jauncey ,
D. L. Jones ,
A. K. Tzioumis ,
R. H. Ferris ,
E. A. King  and
J. E. J. Lovell
...Show all authors
J. C. Guirado
Affiliation:
Met Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA Departamento de Astronomía, Universitat de València, 46100 Burjassot, València, Spain
J. E. Reynolds
Affiliation:
Australian Telescope National Facility, Epping, New South Wales 2121, Australia
J.-F. Lestrade
Affiliation:
Observatoire de Paris-Meudon-CNRS, F-92195 Meudon Principal Cedex, France
R. A. Preston
Affiliation:
Met Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
D. L. Jauncey
Affiliation:
Australian Telescope National Facility, Epping, New South Wales 2121, Australia
D. L. Jones
Affiliation:
Met Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
A. K. Tzioumis
Affiliation:
Australian Telescope National Facility, Epping, New South Wales 2121, Australia
R. H. Ferris
Affiliation:
Australian Telescope National Facility, Epping, New South Wales 2121, Australia
E. A. King
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
J. E. J. Lovell
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
P. M. McCulloch
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
K. J. Johnston
Affiliation:
U.S. Naval Observatory, Washington D.C., 20392, USA
K. A. Kingham
Affiliation:
U.S. Naval Observatory, Washington D.C., 20392, USA
J. O. Martin
Affiliation:
U.S. Naval Observatory, Washington D.C., 20392, USA
G. L. White
Affiliation:
University of Western Sydney, Sydney, New South Wales, Australia
P. A. Jones
Affiliation:
University of Western Sydney, Sydney, New South Wales, Australia
F. Arenou
Affiliation:
Observatoire de Paris-Meudon-CNRS, F-92195 Meudon Principal Cedex, France
M. Froeschlé
Affiliation:
Observatoire de la Côte d’Azur, CERGA, F-06130 Grasse, France
J. Kovalevsky
Affiliation:
Observatoire de la Côte d’Azur, CERGA, F-06130 Grasse, France
C. Martin
Affiliation:
Observatoire de la Côte d’Azur, CERGA, F-06130 Grasse, France
L. Lindegren
Affiliation:
Lund Observatory, S-22100 Lund, Sweden
S. Soderhjelm
Affiliation:
Lund Observatory, S-22100 Lund, Sweden

Abstract

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From the combination of VLBI phase-referenced observations and Hipparcos satellite data, we have found evidence of a low-mass object orbiting the late-type star AB Doradus. The mass of the new object is near the hydrogen burning limit and will constitute a precise point for calibrating the low end of the main sequence. This represents the first detection of a low-mass stellar companion using the VLBI technique, which could become an important tool in future searches for planets and brown dwarfs orbiting other stars.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 325 - 326
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

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