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Dynamical Evidence of a Spiral Arm–driving Planet in the MWC 758 Protoplanetary Disk

  • Authors: Bin Ren, Ruobing Dong, Rob G. van Holstein, Jean-Baptiste Ruffio, Benjamin A. Calvin, Julien H. Girard, Myriam Benisty, Anthony Boccaletti, Thomas M. Esposito, Élodie Choquet, Dimitri Mawet, Laurent Pueyo, Tomas Stolker, Eugene Chiang, Jozua de Boer, John H. Debes, Antonio Garufi, Carol A. Grady, Dean C. Hines, Anne-Lise Maire, François Ménard, Maxwell A. Millar-Blanchaer, Marshall D. Perrin, Charles A. Poteet, and Glenn Schneider

2020 The Astrophysical Journal Letters 898 L38.

  • Provider: AAS Journals

Caption: Figure 2.

Arm location pairs in polar coordinates. The error bars are the peak positions of spiral arms in the form of (θ, r) pairs in the deprojected version of Figure 1, where θ is the counter-clockwise deviation from the northeast semimajor axis. The colored lines are the best-fit companion-driven model to the observations. The angular offset between the colored lines is 1.°04 ± 0.°14. The observation does not follow the gravitational instability prediction for a 1.9 ± 0.2 M central star.

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