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Physical Properties of Binary Brown Dwarfs

Published online by Cambridge University Press:  21 October 2010

W. Brandner ,
M. Stumpf ,
R. Köhler ,
V. Joergens ,
F. Hormuth ,
K. Geißler ,
B. Goldman ,
T. Henning ,
H. Bouy  and
E. Martin
W. Brandner
Affiliation:
Max Planck Institute for Astronomy
M. Stumpf
Affiliation:
Max Planck Institute for Astronomy
R. Köhler
Affiliation:
Max Planck Institute for Astronomy
V. Joergens
Affiliation:
Max Planck Institute for Astronomy
F. Hormuth
Affiliation:
Max Planck Institute for Astronomy
K. Geißler
Affiliation:
Max Planck Institute for Astronomy
B. Goldman
Affiliation:
Max Planck Institute for Astronomy
T. Henning
Affiliation:
Max Planck Institute for Astronomy
H. Bouy
Affiliation:
Instituto de Astrofísica de Canarias, Spain
E. Martin
Affiliation:
Instituto de Astrofísica de Canarias, Spain
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Astrometric observations of binary brown dwarfs yield dynamical masses of the components independently of theoretical models. We give an update on our long-term high-resolution spectroscopic and photometric monitoring programme of spatially resolved binary brown dwarfs using ground-based adaptive optics and the Hubble Space Telescope. We present current orbital fits, including refined dynamical mass estimate of the Kelu-1 AB system. The results seem to support the previously reported trend that evolutionary and atmospheric models might underestimate the mass of very-low-mass stars and brown dwarfs.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 757
Copyright
Copyright © International Astronomical Union 2010