Article (Scientific journals)
Observations of fast-moving features in the debris disk of AU Mic on a three-year timescale: Confirmation and new discoveries
Boccaletti, A.; Sezestre, E.; Lagrange, A.-M. et al.
2018In Astronomy and Astrophysics, 614, p. 52
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Keywords :
stars: individual: AU Mic; circumstellar matter; planetary systems; planet-disk interactions; techniques: high angular resolution; techniques: image processing; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics
Abstract :
[en] Context. The nearby and young M star AU Mic is surrounded by a debris disk in which we previously identified a series of large-scale arch-like structures that have never been seen before in any other debris disk and that move outward at high velocities. <BR /> Aims: We initiated a monitoring program with the following objectives: (1) track the location of the structures and better constrain their projected speeds, (2) search for new features emerging closer in, and ultimately (3) understand the mechanism responsible for the motion and production of the disk features. <BR /> Methods: AU Mic was observed at 11 different epochs between August 2014 and October 2017 with the IR camera and spectrograph of SPHERE. These high-contrast imaging data were processed with a variety of angular, spectral, and polarimetric differential imaging techniques to reveal the faintest structures in the disk. We measured the projected separations of the features in a systematic way for all epochs. We also applied the very same measurements to older observations from the Hubble Space Telescope (HST) with the visible cameras STIS and ACS. <BR /> Results: The main outcomes of this work are (1) the recovery of the five southeastern broad arch-like structures we identified in our first study, and confirmation of their fast motion (projected speed in the range 4-12 km s[SUP]-1[/SUP]); (2) the confirmation that the very first structures observed in 2004 with ACS are indeed connected to those observed later with STIS and now SPHERE; (3) the discovery of two new very compact structures at the northwest side of the disk (at 0.40'' and 0.55'' in May 2015) that move to the southeast at low speed; and (4) the identification of a new arch-like structure that might be emerging at the southeast side at about 0.4'' from the star (as of May 2016). <BR /> Conclusions: Although the exquisite sensitivity of SPHERE allows one to follow the evolution not only of the projected separation, but also of the specific morphology of each individual feature, it remains difficult to distinguish between possible dynamical scenarios that may explain the observations. Understanding the exact origin of these features, the way they are generated, and their evolution over time is certainly a significant challenge in the context of planetary system formation around M stars. <P />Based on data collected at the European Southern Observatory, Chile under programs 060.A-9249, 095.C-0298, 096.C-0625, 097.C-0865, 097.C-0813, 598.C-0359.A movie associated to Fig. 6 is available at <A h ref="https://www.aanda.org/10.1051/0004-6361/201732462/olm">http://https ://www.aanda.org</A>
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Boccaletti, A.;  LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot, Sorbonne Paris Cité(c), UPMC Paris 6, Sorbonne Univ., 5 place Jules Janssen, 92195, Meudon, France
Sezestre, E.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Lagrange, A.-M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Thébault, P.;  LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot, Sorbonne Paris Cité(c), UPMC Paris 6, Sorbonne Univ., 5 place Jules Janssen, 92195, Meudon, France
Gratton, R.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Langlois, M.;  CRAL, UMR 5574, CNRS/ENS-L/Université Lyon 1, 9 av. Ch. André, 69561, Saint-Genis-Laval, France ; Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Thalmann, C.;  Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland
Janson, M.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; Department of Astronomy, Stockholm University, AlbaNova University Center, 10691, Stockholm, Sweden
Delorme, P.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Augereau, J.-C.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Schneider, G.;  Steward Observatory, 933 North Cherry Avenue, Tucson, AZ, 85719, USA
Milli, J.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; European Southern Observatory, Alonso de Córdova 3107, Casilla 19001 Vitacura, Santiago 19, Chile
Grady, C.;  Eureka Scientific, 2452 Delmer, Suite 100, Oakland, CA, 96002, USA
Debes, J.;  Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD, 21218, USA
Kral, Q.;  LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot, Sorbonne Paris Cité(c), UPMC Paris 6, Sorbonne Univ., 5 place Jules Janssen, 92195, Meudon, France ; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK
Olofsson, J.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Valparaíso, Chile ; Núcleo Milenio Formación Planetaria - NPF, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaíso, Chile
Carson, J.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; Department of Physics & Astronomy, College of Charleston, 66 George Street, Charleston, SC 29424, USA
Maire, Anne-Lise ;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Henning, T.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Wisniewski, J.;  Department of Physics and Astronomy, The University of Oklahoma, 440 W. Brooks St., Norman, OK, 73019, USA
Schlieder, J.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; Exoplanets & Stellar Astrophysics Laboratory, Code 667, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
Dominik, C.;  Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
Desidera, S.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Ginski, C.;  Leiden Observatory, Leiden University, PO Box 9513, 2300 RA, Leiden, The Netherlands
Hines, D.;  Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD, 21218, USA
Ménard, F.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Mouillet, D.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Pawellek, N.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Vigan, A.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Lagadec, E.;  Université Cote d'Azur, OCA, CNRS, 66 George Street, Charleston, SC 29424, USA
Avenhaus, H.;  Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland
Beuzit, J.-L.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Biller, B.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; Institute for Astronomy, University of Edinburgh, Blackford Hill View, Edinburgh, EH9 3HJ, UK
Bonavita, M.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy ; Institute for Astronomy, University of Edinburgh, Blackford Hill View, Edinburgh, EH9 3HJ, UK
Bonnefoy, M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Brandner, W.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Cantalloube, F.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Chauvin, G.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Cheetham, A.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Cudel, M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Gry, C.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Daemgen, S.;  Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland
Feldt, M.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Galicher, R.;  LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot, Sorbonne Paris Cité(c), UPMC Paris 6, Sorbonne Univ., 5 place Jules Janssen, 92195, Meudon, France
Girard, J.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD, 21218, USA
Hagelberg, J.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Janin-Potiron, P.;  Université Cote d'Azur, OCA, CNRS, 66 George Street, Charleston, SC 29424, USA
Kasper, M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748, Garching, Germany
Le Coroller, H.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Mesa, D.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Peretti, S.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Perrot, C.;  LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot, Sorbonne Paris Cité(c), UPMC Paris 6, Sorbonne Univ., 5 place Jules Janssen, 92195, Meudon, France
Samland, M.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Sissa, E.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Wildi, F.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Zurlo, A.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France ; Núcleo de Astronoma, Facultad de Ingeniera, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile
Rochat, S.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Stadler, E.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Gluck, L.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Origné, A.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Llored, M.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Baudoz, P.;  LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot, Sorbonne Paris Cité(c), UPMC Paris 6, Sorbonne Univ., 5 place Jules Janssen, 92195, Meudon, France
Rousset, G.;  LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot, Sorbonne Paris Cité(c), UPMC Paris 6, Sorbonne Univ., 5 place Jules Janssen, 92195, Meudon, France
Martinez, P.;  Université Cote d'Azur, OCA, CNRS, 66 George Street, Charleston, SC 29424, USA
Rigal, F.;  NOVA Optical Infrared Instrumentation Group, Oude Hoogeveensedijk 4, 7991 PD, Dwingeloo, The Netherlands)
More authors (55 more) Less
Language :
English
Title :
Observations of fast-moving features in the debris disk of AU Mic on a three-year timescale: Confirmation and new discoveries
Publication date :
01 June 2018
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
614
Pages :
A52
Peer reviewed :
Peer Reviewed verified by ORBi
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