On the origin of horseshoes in transitional discs

Abstract

We investigate whether the rings, lopsided features and horseshoes observed at millimetre wavelengths in transitional discs can be explained by the dynamics of gas and dust at the edge of the cavity in circumbinary discs. We use 3D dusty smoothed particle hydrodynamics calculations to show that binaries with mass ratio $q\gtrsim 0.04$ drive eccentricity in the central cavity, naturally leading to a crescent-like feature in the gas density, which is accentuated in the mm dust grain population with intensity contrasts in mm-continuum emission of 10 or higher. We perform mock observations to demonstrate that these features closely match those observed by ALMA, suggesting that the origin of rings, dust horseshoes and other non-axisymmetric structures in transition discs can be explained by the presence of massive companions.

7 pages, 3 figures, 1 table, accepted for publication in MNRAS

References in corpus (12)

• SPLASH: An interactive visualisation tool for Smoothed Particle Hydrodynamics simulations
• Smoothed Particle Hydrodynamics and Magnetohydrodynamics
• 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
• Standing on the shoulders of giants: Trojan Earths and vortex trapping in low mass self-gravitating protoplanetary disks of gas and solids
• Dust Trapping by Vortices in Transitional Disks: Evidence for Non-ideal MHD Effects in Protoplanetary Disks
• Effects of dust feedback on vortices in protoplanetary disks
• CO gas inside the protoplanetary disk cavity in HD 142527: disk structure from ALMA
• Long Term Evolution of Planet-Induced Vortices in Protoplanetary Disks
• The Frequency Of Binary Star Interlopers Amongst Transitional Discs
• Dust traps as planetary birthsites: basics and vortex formation

Cited by in corpus (38)

• Signatures of broken protoplanetary discs in scattered light and in sub-millimetre observations
• Protoplanetary Disks in $\rho$ Ophiuchus as Seen From ALMA
• Exploring dust around HD142527 down to 0.025" / 4au using SPHERE/ZIMPOL
• Streaming Instability for Particle-Size Distributions
• A thermodynamic view of dusty protoplanetary disks
• Is the dust-to-gas ratio constant in molecular clouds?
• Size and structures of disks around very low mass stars in the Taurus star-forming region
• HD 169142 in the eyes of ZIMPOL/SPHERE
• Signatures of an eccentric disc cavity: Dust and gas in IRS 48
• Long-Lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks
• A 80 au cavity in the disk around HD 34282
• Are the spiral arms in the MWC 758 protoplanetary disc driven by a companion inside the cavity?
• ALMA Observations of the Asymmetric Dust Disk around DM Tau
• Efficient Dust Ring Formation in Misaligned Circumbinary Discs
• Circumbinary and circumstellar discs around the eccentric binary IRAS 04158+2805 -- a testbed for binary-disc interaction
• Binary-induced spiral arms inside the disc cavity of AB Aurigae
• Vortex stretching in self-gravitating protoplanetary discs
• Structure of a protobinary system: an asymmetric circumbinary disk and spiral arms
• Impact of Local Pressure Enhancements on Dust Concentration inTurbulent Protoplanetary Discs
• Dust growth, fragmentation and self-induced dust traps in PHANTOM
• Observational signatures of linear warps in circumbinary discs
• The role of the drag force in the gravitational stability of dusty planet-forming disc -- II. Numerical simulations
• The Origin of the Doppler-flip in HD 100546: a large scale spiral arm generated by an inner binary companion
• Eccentric Dust Ring in the IRS 48 Transition Disk
• Kinematical signs of dust trapping and feedback in a local pressure bump in the protoplanetary disk around HD 142527 revealed with ALMA
• Precession and polar alignment of accretion discs in triple (or multiple) stellar systems
• The Appearance of Vortices in Protoplanetary Disks in Near-Infrared Scattered Light
• On the origin of the lump in circumbinary discs
• Extreme Pebble Accretion in Ringed Protoplanetary Discs
• The protoplanetary disc around HD 169142: circumstellar or circumbinary?
• On the vortex evolution in non-isothermal protoplanetary discs
• Eccentricity Growth of Massive Planets inside Cavities of Protoplanetary Discs
• Estimating the depth of gaps opened by planets in eccentric orbit
• Multiple Rings and Asymmetric Structures in the Disk of SR 21
• Synthetic observations of protostellar multiple systems
• Linear and nonlinear eccentric mode evolution in unstratified MHD discs
• Single Fluid vs. Multifluid: Comparison between single fluid and multifluid dust models for disc planet interactions
• On the cavity size in circumbinary discs