Stars: individual: HD169142; Planets and satellites: detection; formation; Techniques: high angular resolution; Protoplanetary disc; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] We present observations of the Herbig Ae star HD 169142 with the VLT/SPHERE instruments InfraRed Dual-band Imager and Spectrograph (IRDIS) (K1K2 and H2H3 bands) and the Integral Field Spectrograph (IFS) (Y, J and H bands). We detect several bright blobs at ̃180 mas separation from the star, and a faint arc-like structure in the IFS data. Our reference differential imaging (RDI) data analysis also finds a bright ring at the same separation. We show, using a simulation based on polarized light data, that these blobs are actually part of the ring at 180 mas. These results demonstrate that the earlier detections of blobs in the H and K[SUB]S[/SUB] bands at these separations in Biller et al. as potential planet/substellar companions are actually tracing a bright ring with a Keplerian motion. Moreover, we detect in the images an additional bright structure at ̃93 mas separation and position angle of 355°, at a location very close to previous detections. It appears point-like in the YJ and K bands but is more extended in the H band. We also marginally detect an inner ring in the RDI data at ̃100 mas. Follow-up observations are necessary to confirm the detection and the nature of this source and structure.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Ligi, R.; Aix Marseille Univ, CNRS, LAM, Laboratoire d'Astrophysique de Marseille, Marseille, France
Vigan, A.; Aix Marseille Univ, CNRS, LAM, Laboratoire d'Astrophysique de Marseille, Marseille, France
de Boer, J.; Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, Netherlands
Benisty, M.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Boccaletti, A.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, France
Quanz, S. P.; Institute for Astronomy, ETH Zurich, Wolfgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland
Meyer, M.; Institute for Astronomy, ETH Zurich, Wolfgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland ; Department of Astronomy, University of Michigan, 1085 S. University Ave, Ann Arbor, MI 48109-1107, USA
Ginski, C.; Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, Netherlands
Gry, C.; Aix Marseille Univ, CNRS, LAM, Laboratoire d'Astrophysique de Marseille, Marseille, France
Henning, T.; Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany
Beuzit, J.-L.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Biller, B.; Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK
Bonnefoy, M.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Chauvin, G.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Cheetham, A. C.; Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, CH-1290 Versoix, Switzerland ; Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
Cudel, M.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Delorme, P.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Feldt, M.; Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany
Galicher, R.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, France
Girard, J.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France ; European Southern Observatory (ESO), Alonso de Còrdova 3107, Vitacura, 19001 Casilla, Santiago, Chile
Janson, M.; Department of Astronomy, Stockholm University, SE-106 91 Stockholm, Sweden
Kasper, M.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France ; European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching, Germany
Kopytova, T.; Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany ; School of Earth, and Space Exploration, Arizona State University, Tempe, AZ 85287, USA ; Ural Federal University, Yekaterinburg 620002, Russia
Lagrange, A.-M.; Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Langlois, M.; Aix Marseille Univ, CNRS, LAM, Laboratoire d'Astrophysique de Marseille, Marseille, France ; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 avenue Charles André, F-69561 Saint Genis Laval Cedex, France
Lecoroller, H.; Aix Marseille Univ, CNRS, LAM, Laboratoire d'Astrophysique de Marseille, Marseille, France
Peretti, S.; Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, CH-1290 Versoix, Switzerland
Perrot, C.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, France
Pinilla, P.; Department of Astronomy/Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
Pohl, A.; Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany ; Heidelberg University, Institute of Theoretical Astrophysics, Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany
Rouan, D.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, France
Stolker, T.; Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, Netherlands
Samland, M.; Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany
Wahhaj, Z.; Aix Marseille Univ, CNRS, LAM, Laboratoire d'Astrophysique de Marseille, Marseille, France ; European Southern Observatory (ESO), Alonso de Còrdova 3107, Vitacura, 19001 Casilla, Santiago, Chile
Wildi, F.; Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, CH-1290 Versoix, Switzerland
Zurlo, A.; Aix Marseille Univ, CNRS, LAM, Laboratoire d'Astrophysique de Marseille, Marseille, France ; Núcleo de Astronomía, Facultad de Ingeniería, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile ; Millennium Nucleus Protoplanetary Disk, Departamento de Astronomiá, Universidad de Chile, Casilla 36-D, Santiago, Chile
Buey, T.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, France
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