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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 606234.0, MPI für Astronomie / Publikationen_mpia
VLT/NACO astrometry of the HR 8799 planetary system. L'-band observations of the three outer planets
Authors:Bergfors, C.; Brandner, W.; Janson, M.; Köhler, R.; Henning, T.
Date of Publication (YYYY-MM-DD):2011
Journal Abbrev.:Astronomy and Astrophysics
Volume:528
Start Page:id.A134
Audience:Not Specified
Abstract / Description:Context. HR 8799 is so far the only directly imaged multiple exoplanet system. The orbital configuration would, if better known, provide valuable insight into the formation and dynamical evolution of wide-orbit planetary systems. <BR /> Aims: We present data which add to the astrometric monitoring of the planets HR 8799 b, c and d. We investigate how well the two simple cases of (i) a circular orbit and (ii) a face-on orbit fit the astrometric data for HR 8799 d over a total time baseline of ~2 years. <BR /> Methods: The HR 8799 planetary system was observed in L'-band with NACO at VLT. <BR /> Results: The results indicate that the orbit of HR 8799 d is inclined with respect to our line of sight, and suggest that the orbit is slightly eccentric or non-coplanar with the outer planets and debris disk. Based on observations collected at the European Southern Observatory, Chile, under programme ID 084.C-0072.
Free Keywords:planetary systems; stars: individual: HR 8799
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2011A%26A...528A.13...
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