VLT/NACO astrometry of the HR 8799 planetary system

• Verfasst von: Bergfors, Carolina [VerfasserIn]
• Verfasst von: Brandner, W. [VerfasserIn]
• Verfasst von: Janson, M. [VerfasserIn]
• Verfasst von: Köhler, R. [VerfasserIn]
• Verfasst von: Henning, Thomas [VerfasserIn]
• Titel: VLT/NACO astrometry of the HR 8799 planetary system
• Titelzusatz: L′-band observations of the three outer planets
• Verf.angabe: C. Bergfors, W. Brandner, M. Janson, R. Köhler, and T. Henning
• E-Jahr: 2011
• Jahr: 15 March 2011
• Umfang: 4 S.
• Fussnoten: Gesehen am 17.03.2022
• Titel Quelle: Enthalten in: Astronomy and astrophysics
• Ort Quelle: Les Ulis : EDP Sciences, 1969
• Jahr Quelle: 2011
• Band/Heft Quelle: 528(2011) vom: Apr., Artikel-ID A134, Seite 1-4
• ISSN Quelle: 1432-0746
• DOI: doi:10.1051/0004-6361/201116493
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1795851996

Abstract

<i>Context.<i/> 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.<i>Aims.<i/> 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.<i>Methods.<i/> The HR 8799 planetary system was observed in <i>L<i/>′-band with NACO at VLT.<i>Results.<i/> 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.