Reference : Dynamical Evidence of a Spiral Arm-driving Planet in the MWC 758 Protoplanetary Disk
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/251644
Dynamical Evidence of a Spiral Arm-driving Planet in the MWC 758 Protoplanetary Disk
English
Ren, Bin [Department of Astronomy, California Institute of Technology, 1216 East California Boulevard, Pasadena, CA 91125, USA]
Dong, Ruobing [Department of Physics & Astronomy, University of Victoria, Victoria, BC V8P 1A1, Canada]
van Holstein, Rob G. [Leiden Observatory, Universiteit Leiden, PO Box 9513, 2300 RA Leiden, The Netherlands; European Southern Observatory, Alonso de Córdova 3107, Casilla 19001, Vitacura, Santiago, Chile]
Ruffio, Jean-Baptiste [Department of Astronomy, California Institute of Technology, 1216 East California Boulevard, Pasadena, CA 91125, USA]
Calvin, Benjamin A. [Department of Astronomy, California Institute of Technology, 1216 East California Boulevard, Pasadena, CA 91125, USA]
Girard, Julien H. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA]
Benisty, Myriam [Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France; Unidad Mixta Internacional Franco-Chilena de Astronomía (CNRS, UMI 3386), Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, Chile]
Boccaletti, Anthony [LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC, Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92195 Meudon, France]
Esposito, Thomas M. [Department of Astronomy, University of California, Berkeley, CA 94720, USA]
Choquet, Élodie [Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France]
Mawet, Dimitri [Department of Astronomy, California Institute of Technology, 1216 East California Boulevard, Pasadena, CA 91125, USA]
Pueyo, Laurent [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA]
Stolker, Tomas [Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093 Zürich, Switzerland]
Chiang, Eugenede [Department of Astronomy, University of California, Berkeley, CA 94720, USA]
Boer, Jozua [Leiden Observatory, Universiteit Leiden, PO Box 9513, 2300 RA Leiden, The Netherlands]
Debes, John H. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA]
Garufi, Antonio [INAF, Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, I-50125 Firenze, Italy]
Grady, Carol A. [Exoplanets and Stellar Astrophysics Laboratory, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771, USA]
Hines, Dean C. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA]
Maire, Anne-Lise mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > PSILab >]
Ménard, François [Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France]
Millar-Blanchaer, Maxwell A. [Department of Astronomy, California Institute of Technology, 1216 East California Boulevard, Pasadena, CA 91125, USA]
Perrin, Marshall D. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA]
Poteet, Charles A. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA]
Schneider, Glenn [Steward Observatory, The University of Arizona, Tucson, AZ 85721, USA)]
1-Aug-2020
Astrophysical Journal
University of Chicago Press
898
L38
Yes (verified by ORBi)
0004-637X
1538-4357
IL
[en] Protoplanetary disks ; Coronagraphic imaging ; Planetary system formation ; Orbital motion ; 1300 ; 313 ; 1257 ; 1179 ; Astrophysics - Earth and Planetary Astrophysics ; Astrophysics - Solar and Stellar Astrophysics
[en] More than a dozen young stars host spiral arms in their surrounding protoplanetary disks. The excitation mechanisms of such arms are under debate. The two leading hypotheses—companion-disk interaction and gravitational instability (GI)—predict distinct motion for spirals. By imaging the MWC 758 spiral arm system at two epochs spanning ∼5 yr using the SPHERE instrument on the Very Large Telescope, we test the two hypotheses for the first time. We find that the pattern speeds of the spirals are not consistent with the GI origin. Our measurements further evince the existence of a faint "missing planet" driving the disk arms. The average spiral pattern speed is 0°22 ± 0°03 yr[SUP]-1[/SUP], pointing to a driver at ${172}_{-14}^{+18}$ au around a 1.9 M[SUB]☉[/SUB] central star if it is on a circular orbit. In addition, we witness time-varying shadowing effects on a global scale that are likely originating from an inner disk.
http://hdl.handle.net/2268/251644
10.3847/2041-8213/aba43e
https://ui.adsabs.harvard.edu/abs/2020ApJ...898L..38R
https://iopscience.iop.org/article/10.3847/2041-8213/aba43e - Copyright The American Astronomical Society (AAS) and IOP Publishing Limited 2020

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