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Mid-Infrared Variability in Binary Brown Dwarfs

Published online by Cambridge University Press:  21 October 2010

Michael F. Sterzik ,
Gael Chauvin ,
Kerstin Geißler  and
Eric Pantin
Michael F. Sterzik
Affiliation:
European Southern Observatory, Casilla 19001, Santiago 19, Chile email: [email protected]
Gael Chauvin
Affiliation:
Laboratoire d' Astrophysique, Observatoire de Grenoble, 38041 Grenoble Cedex 9, France
Kerstin Geißler
Affiliation:
European Southern Observatory, Casilla 19001, Santiago 19, Chile email: [email protected] Max-Planck-Institut for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
Eric Pantin
Affiliation:
CEA/Saclay, DSM/DAPNIA/Service d' Astrophysique, 91191 Gif-sur-Yvette, France
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Abstract

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We have spatially resolved several nearby binary brown dwarfs and obtained mid-infrared photometry with VISIR at the VLT. In particular, we have monitored ε Indi B and HD 130948 in several narrow-band MIR filters. The 10.5μm band is a probe to constrain non-equilibrium chemistry in the atmosphere of cool brown dwarfs.

Keywords

stars: low-massbrown dwarfsbinaries: close
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 762
Copyright
Copyright © International Astronomical Union 2010

References

Geißler, K., Chauvin, G., & Sterzik, M. F. 2008, A&A 480, 193Google Scholar
Geißler, K., Sterzik, M. F., Chauvin, G., & Pantin, E. 2009, in: Stempels, E. (ed.), Cool Stars, Stellar Systems and the Sun, 15th Cambridge Workshop (AIP), p. 521Google Scholar
Hubeny, I. & Burrows, A. 2007, ApJ 669, 1248CrossRefGoogle Scholar
Sterzik, M. F., Pantin, E., Hartung, M., Huelamo, N., Kaufer, A., Käufl, H. U., Melo, C., Nürnberger, D., Siebenmorgen, R., & Smette, A. 2005, A&A 436, L39Google Scholar