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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 308706.0, MPI für Astronomie / Publikationen_mpia
L-band search for substellar companions in the Tucana and beta Pictoris moving groups
Authors:Kasper, M.; Apai, D.; Brandner, W.; Close, L. M.; Geißler, K.
Publisher:Cambridge Univ. Pr.
Date of Publication (YYYY-MM-DD):2006
Title of Proceedings:Direct Imaging of Exoplanets: Science & Techniques
Start Page:175
End Page:180
Title of Series:IAU Colloq.
Volume (in Series):200
Name of Conference/Meeting:Direct Imaging of Exoplanets: Science & Techniques
Audience:Not Specified
Abstract / Description:Radial velocity surveys provide evidence that giant extrasolar planets are common, but their detection space is limited to only a few astronomical units from the stars. In order to close this gap, the adaptive optics assisted NIR imager NAOS-CONICA (NACO) at the VLT was used for a deep (15-20 minutes exposure time per target) L-band survey of a sample of closeby young stars. All stars are members of the Tucana and beta Pictoris moving groups apart from the the somewhat older star HIP 71395 that has a radial velocity trend suggesting a massive planet in large orbit. The chosen observation wavelength is very well suited for very high contrast imaging of close companions at this age and makes this survey unique. The goal was to detect substellar companions to these stars at distances as close as 5-20 AU and ultimately to detect giant extrasolar planets down to a few Jupiter masses, to measure their frequency, and - by comparison with models - determine their physical properties. This paper presents the results obtained on a subsample of 12 stars that have been observed during ESO P73.
Comment of the Author/Creator:Date: 2006, January 1, 2006
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
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