stars: individual: HD 97048; protoplanetary disks; planet-disk interactions; techniques: polarimetric; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] <BR /> Aims: We studied the well-known circumstellar disk around the Herbig Ae/Be star HD 97048 with high angular resolution to reveal undetected structures in the disk which may be indicative of disk evolutionary processes such as planet formation. <BR /> Methods: We used the IRDIS near-IR subsystem of the extreme adaptive optics imager SPHERE at the ESO/VLT to study the scattered light from the circumstellar disk via high resolution polarimetry and angular differential imaging. <BR /> Results: We imaged the disk in unprecedented detail and revealed four ring-like brightness enhancements and corresponding gaps in the scattered light from the disk surface with radii between 39 au and 341 au. We derived the inclination and position angle as well as the height of the scattering surface of the disk from our observational data. We found that the surface height profile can be described by a single power law up to a separation 270 au. Using the surface height profile we measured the scattering phase function of the disk and found that it is consistent with theoretical models of compact dust aggregates. We discuss the origin of the detected features and find that low mass (≤1 M[SUB]Jup[/SUB]) nascent planets are a possible explanation. <P />Based on data collected at the European Southern Observatory, Chile (ESO Programs 096.C-0248, 096.C-0241, 077.C-0106).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Ginski, C.; Leiden Observatory, Leiden University, PO Box 9513, 2300 RA, Leiden, The Netherlands
Stolker, T.; Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
Pinilla, P.; Leiden Observatory, Leiden University, PO Box 9513, 2300 RA, Leiden, The Netherlands
Dominik, C.; Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
Boccaletti, A.; LESIA, Observatoire de Paris-Meudon, CNRS, Université Pierre et Marie Curie, Université Paris Diderot, 5 place Jules Janssen, 92195, Meudon, France
de Boer, J.; Leiden Observatory, Leiden University, PO Box 9513, 2300 RA, Leiden, The Netherlands
Benisty, M.; Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France
Biller, B.; Institute for Astronomy, University of Edinburgh, Blackford Hill View, Edinburgh, EH9 3HJ, UK
Feldt, M.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Garufi, Antonio; Institute for Astronomy, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland ; Universidad Autónoma de Madrid, Dpto. Física Teórica, Módulo 15, Facultad de Ciencias, Campus de Cantoblanco, 28049, Madrid, Spain
Keller, C. U.; Leiden Observatory, Leiden University, PO Box 9513, 2300 RA, Leiden, The Netherlands
Kenworthy, M.; Leiden Observatory, Leiden University, PO Box 9513, 2300 RA, Leiden, The Netherlands
Maire, Anne-Lise ; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Ménard, F.; Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France
Milli, J.; ESO, Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago de Chile, Chile
Min, M.; SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA, Utrecht, The Netherlands ; Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
Pinte, C.; Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France
Quanz, S. P.; Institute for Astronomy, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland
van Boekel, R.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Bonnefoy, M.; Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France
Chauvin, G.; Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France
Girard, J. H. V.; ESO, Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago de Chile, Chile
Keppler, M.; Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France
Kopytova, T.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Lagrange, A.-M.; Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France
Langlois, M.; CRAL, UMR 5574, CNRS, Université Lyon 1, 9 Avenue Charles André, 69561, Saint Genis Laval Cedex, France ; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
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