stars: individual: NZ Lup; planet-disk interactions; techniques: high angular resolution; techniques: image processing; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics
Abstract :
[en] Context. Planetary systems hold the imprint of the formation and of the evolution of planets especially at young ages, and in particular at the stage when the gas has dissipated leaving mostly secondary dust grains. The dynamical perturbation of planets in the dust distribution can be revealed with high-contrast imaging in a variety of structures. <BR /> Aims: SPHERE, the high-contrast imaging device installed at the VLT, was designed to search for young giant planets in long period, but is also able to resolve fine details of planetary systems at the scale of astronomical units in the scattered-light regime. As a young and nearby star, NZ Lup was observed in the course of the SPHERE survey. A debris disk had been formerly identified with HST/NICMOS. <BR /> Methods: We observed this system in the near-infrared with the camera in narrow and broad band filters and with the integral field spectrograph. High contrasts are achieved by the mean of pupil tracking combined with angular differential imaging algorithms. <BR /> Results: The high angular resolution provided by SPHERE allows us to reveal a new feature in the disk which is interpreted as a superimposition of two belts of planetesimals located at stellocentric distances of 85 and 115 au, and with a mutual inclination of about 5°. Despite the very high inclination of the disk with respect to the line of sight, we conclude that the presence of a gap, that is, a void in the dust distribution between the belts, is likely. <BR /> Conclusions: We discuss the implication of the existence of two belts and their relative inclination with respect to the presence of planets. <P />Reduced images of Fig. 1 are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-stras bg.fr">http://cdsarc.u-strasbg.fr</A>(ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/625/A21">http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/625/A21</A>Based on data collected at the European Southern Observatory, Chile under programs 097.C-0523, 097.C-0865, 198.C-0209.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Boccaletti, A.; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Thébault, P.; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Pawellek, N.; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Lagrange, A.-M.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Galicher, Raphaël; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Milli, J.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France ; European Southern Observatory, Alonso de Córdova 3107, Casilla, 19001, Vitacura, Santiago 19, Chile
Kral, Q.; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Bonnefoy, M.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Augereau, J.-C.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Maire, Anne-Lise ; Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany ; STAR Institute, Université de Liège, Allée du Six Août 19c, B-4000 Liège, Belgium
Henning, T.; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Beust, H.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Rodet, L.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Avenhaus, H.; ETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland
Bhowmik, T.; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Bonavita, M.; INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy ; SUPA, Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
Chauvin, G.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Cheetham, A.; Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, Switzerland
Cudel, M.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Feldt, M.; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Hagelberg, J.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Janin-Potiron, P.; CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, Aix-Marseille Université, 13388, Marseille, France
Langlois, M.; CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, Aix-Marseille Université, 13388, Marseille, France ; CRAL, UMR 5574, CNRS, Université de Lyon, Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon, Cedex 07, France
Menard, F.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Meyer, M.; ETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland ; Department of Astronomy, University of Michigan, 1085 South University, Ann Arbor, MI, 48109, USA
Peretti, S.; Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, Switzerland
Perrot, C.; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France ; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Avenue Gran Bretaña 1111, Valparaíso, Chile ; Núcleo Milenio Formación Planetaria - NPF, Universidad de Valparaíso, Avenue Gran Bretaña 1111, Valparaíso, Chile
Schmidt, T.; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Vigan, A.; CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, Aix-Marseille Université, 13388, Marseille, France
Rickman, E.; Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, Switzerland
Magnard, Y.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Maurel, D.; CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Moeller-Nilsson, O.; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Perret, D.; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
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