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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 448019.0, MPI für Astronomie / Publikationen_mpia
Search for wide, ultracool companions of nearby T dwarfs
Authors:Osorio, M. R. Zapatero; Béjar, V. J. S.; Goldman, B.; Rebolo, R.; Bihain, G.; Bouy, H.
Language:English
Publisher:AIP, Springer
Place of Publication:New York
Date of Publication (YYYY-MM-DD):2009
Title of Proceedings:Cool Stars, Stellar Systems and the Sun
Start Page:576
End Page:579
Title of Series:AIP Conference Proceedings
Volume (in Series):1094
Review Status:not specified
Audience:Experts Only
Abstract / Description:We report on our on-going proper motion survey of very low-mass (>=5 MJup), ultracool (Teff>=350 K) companions of nearby, field T-type brown dwarfs in the Solar neighborhood. Our project is intended to provide seeing-limited images of the targets to find companion candidates at wide separations (>=15 AU) and within an area of 3'×3' around the primaries, thus complementing previous searches that explored the inner-most regions. Data are collected in the J-band with 2-4-m class telescopes; the completeness magnitude of our survey goes from ~19.5 to ~21 mag (depending on seeing and transparency conditions). So far we have studied 11 late-L and T-type brown dwarfs located at d<=16 pc of the Sun. Only one faint, proper motion companion candidate is found; its definitive confirmation highly requires third epoch data.
Free Keywords:brown dwarfs; extrasolar planets; telescopes
Comment of the Author/Creator:Date: 2009, February 1, 2009
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISBN:978-0735406278 [ID No:1]
URL:http://adsabs.harvard.edu/abs/2009AIPC.1094..576O [ID No:2]
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