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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 710721.0, MPI für Astronomie / Publikationen_mpia
Properties of the young gas giant planet b Pictoris b
Authors:Bonnefoy, M.; Boccaletti, A.; Lagrange, A.-M.; Allard, F.; Mordasini, C.; Beust, H.; Chauvin, G.; Girard, J. H. V.; Homeier, D.; Apai, D.; Lacour, S.; Rouan, D.; Rameau, J.; Klahr, H.; Matthews, B. C.; Graham, J. R.
Place of Publication:Cambridge
Publisher:Cambridge Univ. Press
Date of Publication (YYYY-MM-DD):2014
Audience:Not Specified
Abstract / Description:The young (12+8 -4 Myr) and nearby (19.44+/-0.05 pc) star beta Pictoris is considered one of the best laboratories for the study of early phases of planetary systems formation since the identification of an extended debris disk surrounding the star in 1984. In 2009, we imaged at 3.8 mum with NaCo at VLT a gas giant planet around beta Pictoris, roughly along the disk mid-plane, with a semi-major axis between 8 and 14 AU. We present here the first images of the planet in the J (1.265 mum), H (1.66 mum), and M' (4.78 mum) bands obtained between 2011 and 2012. We used these data to build the 1-5 mum spectral energy distribution (SED) of the companion, and to consolidate previous semi-major axis (8-10 AU) estimates. We compared the SED to seven atmospheric models to derive Teff = 1700 +/- 100 K. We used the temperature and the luminosity of beta Pictoris b to estimate new masses for the companion. We compared these masses to independent constraints set by the orbital parameters and the radial velocities and use them to discuss the formation history of the object.
Free Keywords:instrumentation: adaptive optics; high angular resolution; stars: beta Pictoris; Exoplanets: formation; evolution; atmosphere
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
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