[en] Context. Transition disks are considered sites of ongoing planet formation, and their dust and gas distributions could be signposts of embedded planets. The transition disk around the T Tauri star RY Lup has an inner dust cavity and displays a strong silicate emission feature. <BR /> Aims: Using high-resolution imaging we study the disk geometry, including non-axisymmetric features, and its surface dust grain, to gain a better understanding of the disk evolutionary process. Moreover, we search for companion candidates, possibly connected to the disk. <BR /> Methods: We obtained high-contrast and high angular resolution data in the near-infrared with the VLT/SPHERE extreme adaptive optics instrument whose goal is to study the planet formation by detecting and characterizing these planets and their formation environments through direct imaging. We performed polarimetric imaging of the RY Lup disk with IRDIS (at 1.6 μm), and obtained intensity images with the IRDIS dual-band imaging camera simultaneously with the IFS spectro-imager (0.9-1.3 μm). <BR /> Results: We resolved for the first time the scattered light from the nearly edge-on circumstellar disk around RY Lup, at projected separations in the 100 au range. The shape of the disk and its sharp features are clearly detectable at wavelengths ranging from 0.9 to 1.6 μm. We show that the observed morphology can be interpreted as spiral arms in the disk. This interpretation is supported by in-depth numerical simulations. We also demonstrate that these features can be produced by one planet interacting with the disk. We also detect several point sources which are classified as probable background objects.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Langlois, M.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France ; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Pohl, A.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Heidelberg University, Institute of Theoretical Astrophysics, Albert-Ueberle-Str. 2, 69120 Heidelberg, Germany
Lagrange, A.-M.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Maire, Anne-Lise ; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Mesa, D.; INAF-Osservatorio Astronomico di Padova, Vicolo dell Osservatorio 5, 35122, Padova, Italy ; INCT, Universidad De Atacama, calle Copayapu 485, Copiapó, Atacama, Chile
Boccaletti, A.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Denneulin, L.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France ; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Klahr, H.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Vigan, A.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Benisty, M.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Dominik, C.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Bonnefoy, M.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Menard, F.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Avenhaus, H.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Cheetham, A.; Observatoire Astronomique, Université de Genève, 51 Ch. des Maillettes, 1290, Versoix, Switzerland
Van Boekel, R.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
de Boer, J.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Chauvin, G.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Feldt, M.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Galicher, R.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Ginski, C.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Girard, J. H.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France ; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
Henning, T.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Janson, M.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France ; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Kopytova, T.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France ; School of Earth & Space Exploration, Arizona State University, Tempe, AZ 85287, USA ; Ural Federal University, Yekaterinburg, 620002, Russia
Kral, Q.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France ; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Ligi, R.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
Messina, S.; Osservatorio Astrofisico di Catania, via S.Sofia 78, 95123, Catania, Italy
Peretti, S.; Observatoire Astronomique, Université de Genève, 51 Ch. des Maillettes, 1290, Versoix, Switzerland
Pinte, C.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, 69561 Saint Genis Laval Cedex, France
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