Volume 559, November 2013
|Number of page(s)||4|
|Published online||28 November 2013|
Searching for companions down to 2 AU from β Pictoris using the L′-band AGPM coronagraph on VLT/NACO
Département d’Astrophysique, Géophysique et Océanographie, Université de
Allée du Six Août 17,
2 European Southern Observatory, Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago, Chile
3 UJF-Grenoble 1/CNRS, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, 38041 Grenoble, France
4 LESIA-Observatoire de Paris, CNRS, UPMC Univ. Paris 06, Univ. Paris-Diderot, 5 Pl. J. Janssen, 92195 Meudon, France
Received: 25 September 2013
Accepted: 6 November 2013
Context. The orbit of the giant planet discovered around β Pic is slightly inclined with respect to the outer parts of the debris disc, which creates a warp in the inner debris disc. This inclination might be explained by gravitational interactions with other planets.
Aims. We aim to search for additional giant planets located at smaller angular separations from the star.
Methods. We used the new L′-band AGPM coronagraph on VLT/NACO, which provides an exquisite inner working angle. A long observing sequence was obtained on β Pic in pupil-tracking mode. To derive sensitivity limits, the collected images were processed using a principal-component analysis technique specifically tailored to angular differential imaging.
Results. No additional planet is detected down to an angular separation of 0.''2with a sensitivity better than 5 MJup. Meaningful upper limits (<10 MJup) are derived down to an angular separation of 0.''1, which corresponds to 2 AU at the distance of β Pic.
Key words: planetary systems / stars: individual: β Pictoris / techniques: high angular resolution
© ESO, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.