Vortices and spirals in the HD135344B transition disk

Abstract

In recent years spiral structures have been seen in scattered light observations and signs of vortices in millimeter images of protoplanetary disks, both probably linked with the presence of planets. We present ALMA Band 7 (335 GHz or 0.89 mm) continuum observations of the transition disk HD135344B at unprecedented spatial resolution of 0.16", using superuniform weighting. The data show that the asymmetric millimeter dust ring seen in previous work actually consists of an inner ring and an outer asymmetric structure. The outer feature is cospatial with the end of one of the spiral arms seen in scattered light, but the feature itself is not consistent with a spiral arm due to its coradiance. We propose a new possible scenario to explain the observed structures at both wavelengths. Hydrodynamical simulations show that a massive planet can generate a primary vortex (which dissipates at longer timescales, becoming an axisymmetric ring) and trigger the formation of a second generation vortex further out. Within this scenario the two spiral arms observed at scattered light originate from a planet at ~30 AU and from the secondary vortex at ~75 AU rather than a planet further out as previously reported.

accepted for publication by ApJ

References in corpus (10)

• Ring shaped dust accumulation in transition disks
• Asymmetric features in the protoplanetary disk MWC758
• Spectro-astrometric imaging of molecular gas within protoplanetary disk gaps
• LkH$\alpha$ 330: Evidence for dust clearing through resolved submillimeter imaging
• Vortex generation in protoplanetary disks with an embedded giant planet
• Gas density drops inside dust cavities of transitional disks around young stars observed with ALMA
• Spiral arms in the disk of HD 142527 from CO emission lines with ALMA
• The Masses of Transition Circumstellar Disks: Observational Support for Photoevaporation Models
• Constraining the structure of the transition disk HD 135344B (SAO 206462) by simultaneous modeling of multiwavelength gas and dust observations
• Rossby wave instability does not require sharp resistivity gradients

Cited by in corpus (26)

• The Disk Substructures at High Angular Resolution Project (DSHARP): III. Spiral Structures in the Millimeter Continuum of the Elias 27, IM Lup, and WaOph 6 Disks
• Protoplanetary disk rings and gaps across ages and luminosities
• Dust-trapping vortices and a potentially planet-triggered spiral wake in the pre-transitional disk of V1247 Orionis
• The GRAVITY Young Stellar Object survey -- I. Probing the disks of Herbig Ae/Be stars in terrestrial orbits
• Dust traps in the protoplanetary disc MWC 758: two vortices produced by two giant planets?
• The widest H$\alpha$ survey of accreting protoplanets around nearby transition disks
• Signatures of an eccentric disc cavity: Dust and gas in IRS 48
• ALMA study of the HD 100453 AB system and the tidal interaction of the companion with the disk
• Dust Traps and the Formation of Cavities in Transition Discs: A millimetre to sub-millimetre comparison survey
• Is the gap in the DS Tau disc hiding a planet?
• Particle Dynamics in 3D Self-gravitating Disks I: Spirals
• Emergence of vortices at the edges of planet-driven gaps in protoplanetary discs
• Kinematical signs of dust trapping and feedback in a local pressure bump in the protoplanetary disk around HD 142527 revealed with ALMA
• Spirals and clumps in V960 Mon: signs of planet formation via gravitational instability around an FU Ori star?
• exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries
• A faint companion around CrA-9: protoplanet or obscured binary?
• Changes in orientation and shape of protoplanetary discs moving through an ambient medium
• The Appearance of Vortices in Protoplanetary Disks in Near-Infrared Scattered Light
• On the origin of the lump in circumbinary discs
• Distinguishing Magnetized Disc Winds from Turbulent Viscosity through Substructure Morphology in Planet-forming Discs
• Emission from Magnetized Accretion Disks around Young Stars
• Confirmation of a ring structure in the disk around MP Mus (PDS 66) with ALMA Band 7 observations
• Observable scattered light features from inclined and non-inclined planets embedded in protoplanetary discs
• exoALMA XX: Tomographic Detection of Embedded Planets in Protoplanetary Disks
• A VLA View of the Flared, Asymmetric Disk Around the Class 0 Protostar L1527 IRS
• The Substructures in Disks undergoing Vertical Shear Instability: II. Observational Predictions for the Dust Continuum