Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57–531906.1
Creators
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1.
European Southern Observatory
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2.
Université Libre de Bruxelles
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3.
University of Valparaíso
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4.
Las Campanas Observatory
Abstract
Using FORS2 on the Very Large Telescope, we have astrometrically monitored over a period of two months the two components of the brown dwarf system WISE J104915.57-531906.1, the closest one to the Sun. Our astrometric measurements – with a relative precision at the milli-arcsecond scale – allowed us to detect the orbital motion and derive more precisely the parallax of the system, leading to a distance of 2.020 ± 0.019 pc. The relative orbital motion of the two objects is found to be perturbed, which leads us to suspect the presence of a substellar companion around one of the two components. We also performed VRIz photometry of the two components and compared this with models. We confirm the flux reversal of the T dwarf.
Additional Information
© 2013 ESO. Article published by EDP Science. Received 3 November 2013; accepted 4 December 2013. It is a pleasure to thank Petro Lazorenko for useful discussions, as well as an anonymous referee for comments that improved the paper. R.K. acknowledges support from FONDECYT through grants No. 1130140. Based on data obtained with the ESO Very Large Telescope under programme 291.C-5004.Attached Files
Published - aa22975-13.pdf
Files
aa22975-13.pdf
Additional details
Identifiers
- Eprint ID
- 57731
- Resolver ID
- CaltechAUTHORS:20150521-094949966
Funding
- Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
- 1130140
Dates
- Created
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2015-05-22Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field