A Decade of MWC 758 Disk Images: Where Are the Spiral-Arm-Driving Planets?

Abstract

Large-scale spiral arms have been revealed in scattered light images of a few protoplanetary disks. Theoretical models suggest that such arms may be driven by and co-rotate with giant planets, which has called for remarkable observational efforts to look for them. By examining the rotation of the spiral arms for the MWC 758 system over a 10-yr timescale, we are able to provide dynamical constraints on the locations of their perturbers. We present reprocessed Hubble Space Telescope (HST)/NICMOS F110W observations of the target in 2005, and the new Keck/NIRC2 $L^{\prime }$-band observations in 2017. MWC~758's two well-known spiral arms are revealed in the NICMOS archive at the earliest observational epoch. With additional Very Large Telescope (VLT)/SPHERE data, our joint analysis leads to a pattern speed of ${0.6^{\circ }}_{-0.6^{\circ }}^{+3.3^{\circ }}{\mathrm{yr}}^{-1}$ at $3\sigma$ for the two major spiral arms. If the two arms are induced by a perturber on a near-circular orbit, its best fit orbit is at $89$ au ($0.59"$), with a $3\sigma$ lower limit of 30 au ($0.20"$). This finding is consistent with the simulation prediction of the location of an arm-driving planet for the two major arms in the system.

9 pages, 4 figures, Published by ApJ Letters. Updated citations, and fixed equation typos in the Appendix

References in corpus (16)

• The Gaia mission
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• Asymmetric features in the protoplanetary disk MWC758
• Shadows and spirals in the protoplanetary disk HD 100453
• Accreting Circumplanetary Disks: Observational Signatures
• Non-negative Matrix Factorization: Robust Extraction of Extended Structures
• Reconnaissance of the HR 8799 Exosolar System II: Astrometry and Orbital Motion
• CO gas inside the protoplanetary disk cavity in HD 142527: disk structure from ALMA
• The W. M. Keck Observatory infrared vortex coronagraph and a first image of HIP79124 B
• Observability of Forming Planets and their Circumplanetary Disks I. -- Parameter Study for ALMA
• The Orbit of the Companion to HD 100453A: Binary-Driven Spiral Arms in a Protoplanetary Disk
• On-sky performance of the QACITS pointing control technique with the Keck/NIRC2 vortex coronagraph
• Spectral Energy Distributions of Accreting Protoplanets
• Spiral Structure and Differential Dust Size Distribution in the LkHa 330 Disk
• Archival Legacy Investigations of Circumstellar Environments: Overview and First Results
• Constraining the Movement of the Spiral Features and the Locations of Planetary Bodies within the AB Aur System

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• Analysis of the arm-like structure in the outer disk of PDS 70. Spiral density wave or vortex?
• Particle Dynamics in 3D Self-gravitating Disks I: Spirals
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• Dynamical detection of a companion driving a spiral arm in a protoplanetary disk
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• Observational Signatures of Planets in Protoplanetary Disks: Temperature structures in spiral arms