Size and structures of disks around very low mass stars in the Taurus star-forming region

Abstract

We aim to estimate if structures, such as cavities, rings, and gaps, are common in disks around VLMS and to test models of structure formation in these disks. We also aim to compare the radial extent of the gas and dust emission in disks around VLMS, which can give us insight about radial drift. We studied six disks around VLMS in the Taurus star-forming region using ALMA Band 7 ($\sim 340$GHz) at a resolution of $\sim 0.1^{\prime \prime }$. The targets were selected because of their high disk dust content in their stellar mass regime. Our observations resolve the disk dust continuum in all disks. In addition, we detect the ${}^{12}$CO ($J=3-2$) emission line in all targets and ${}^{13}$CO ($J=3-2$) in five of the six sources. The angular resolution allows the detection of dust substructures in three out of the six disks, which we studied by using UV-modeling. Central cavities are observed in the disks around stars MHO\,6 (M5.0) and CIDA\,1 (M4.5), while we have a tentative detection of a multi-ringed disk around J0433. Single planets of masses $0.1\sim 0.4M_{\mathrm{Jup}}$ would be required. The other three disks with no observed structures are the most compact and faintest in our sample. The emission of ${}^{12}$CO and ${}^{13}$CO is more extended than the dust continuum emission in all disks of our sample. When using the ${}^{12}$CO emission to determine the gas disk extension $R_{\mathrm{gas}}$, the ratio of $R_{\mathrm{gas}}/R_{\mathrm{dust}}$ in our sample varies from 2.3 to 6.0, which is consistent with models of radial drift being very efficient around VLMS in the absence of substructures. Our observations do not exclude giant planet formation on the substructures observed. A comparison of the size and luminosity of VLMS disks with their counterparts around higher mass stars shows that they follow a similar relation.

References in corpus (35)

• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks
• A Steeper than Linear Disk Mass-Stellar Mass Scaling Relation
• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• Ring shaped dust accumulation in transition disks
• UV excess measures of accretion onto young very low-mass stars and brown dwarfs
• Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
• Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk
• Dust filtration at gap edges: Implications for the spectral energy distributions of discs with embedded planets
• Dust dynamics during protoplanetary disc clearing
• A Millimeter Continuum Size-Luminosity Relationship for Protoplanetary Disks
• Meridional flows in the disk around a young star
• Exploring brown dwarf disks: A 1.3 mm survey in Taurus
• Mass Estimates of a Giant Planet in a Protoplanetary Disk from the Gap Structures
• Viscous Hydrodynamics Simulations of Circumbinary Accretion Discs: Variability, Quasi-Steady State, and Angular Momentum Transfer
• Can dead zones create structures like a transition disk?
• Dust Density Distribution and Imaging Analysis of Different Ice Lines in Protoplanetary Disks
• A giant exoplanet orbiting a very low-mass star challenges planet formation models
• On the origin of horseshoes in transitional discs
• A Map of Dust Reddening to 4.5 kpc from Pan-STARRS1
• The Spatial Distribution of Brown Dwarfs in Taurus
• Brown dwarf disks with ALMA
• Frankenstein: Protoplanetary disc brightness profile reconstruction at sub-beam resolution with a rapid Gaussian process
• High gas/dust size ratio indicating efficient radial drift in the mm-faint CX Tau disk
• Pebble-driven Planet Formation around Very Low-mass Stars and Brown Dwarfs
• Planet formation around M dwarfs via disc instability: Fragmentation conditions and protoplanet properties
• Demographics of disks around young very low-mass stars and brown dwarfs in Lupus
• Radiation pressure clear-out of dusty photoevaporating discs
• The Taurus Boundary of Stellar/Substellar (TBOSS) Survey II. Disk Masses from ALMA Continuum Observations
• Constraining the radial drift of millimeter-sized grains in the protoplanetary disks in Lupus
• ALMA Observations of the Young Substellar Binary System 2M1207
• Brown dwarf disks with Herschel: Linking far-infrared and (sub)-mm fluxes
• Planet gap opening across stellar masses
• Millimeter Spectral Indices and Dust Trapping By Planets in Brown Dwarf Disks
• VLA observations of the disk around the young brown dwarf 2MASS J044427+2512

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