ALMA Observations of the Asymmetric Dust Disk around DM Tau

Abstract

We report an analysis of the dust disk around DM~Tau, newly observed with the Atacama Large Millimeter/submillimeter Array (ALMA) at 1.3 mm. The ALMA observations with high sensitivity (8.4~$\mu$Jy/beam) and high angular resolution (35~mas, 5.1~au) detect two asymmetries on the ring at $r\sim$20~au. They could be two vortices in early evolution, the destruction of a large scale vortex, or double continuum emission peaks with different dust sizes. We also found millimeter emissions with $\sim$50~$\mu$Jy (a lower limit dust mass of 0.3~$M_{\mathrm{Moon}}$) inside the 3-au ring. To characterize these emissions, we modeled the spectral energy distribution (SED) of DM~Tau using a Monte Carlo radiative transfer code. We found that an additional ring at $r=$ 1~au could explain both the DM~Tau SED and the central point source. The disk midplane temperature at the 1-au ring calculated in our modeling is less than the typical water sublimation temperature of 150~K, prompting the possibility of forming small icy planets there.

26 pages, 17 figures

References in corpus (13)

• Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks
• Multiple Disk Gaps and Rings Generated by a Single Super-Earth
• Hydrocarbon emission rings in protoplanetary disks induced by dust evolution
• On the gas content of transitional disks: a VLT/X-Shooter study of accretion and winds
• On the origin of horseshoes in transitional discs
• Dust unveils the formation of a mini-Neptune planet in a protoplanetary ring
• A cavity and further radial substructures in the disk around HD~97048
• Sticking Properties of Silicates in Planetesimal Formation Revisited
• The Structure of Pre-transitional Protoplanetary Disks. II. Azimuthal Asymmetries, Different Radial Distributions of Large and Small Dust Grains in PDS~70
• Dust-trapping vortices and a potentially planet-triggered spiral wake in the pre-transitional disk of V1247 Orionis
• Demographics of Transition Discs in Ophiuchus and Taurus
• Annular substructures in the transition disks around LkCa 15 and J1610
• A Dust Trap in the Young Multiple System HD 34700

Cited by in corpus (17)

• Gas Disk Sizes from CO Line Observations: A Test of Angular Momentum Evolution
• Transition disks: the observational revolution from SEDs to imaging
• From Pebbles and Planetesimals to Planets and Dust: the Protoplanetary Disk--Debris Disk Connection
• Mapping Protoplanetary Disk Vertical Structure with CO Isotopologue Line Emission
• exoALMA IV: Substructures, Asymmetries, and the Faint Outer Disk in Continuum Emission
• Super-resolution trends in the ALMA Taurus survey: Structured inner discs and compact discs
• ALMA Band 6 high-resolution observations of the transitional disk around SY Cha
• Turbulent Dust-trapping Rings as Efficient Sites for Planetesimal Formation
• ALMA Super-resolution Imaging of T Tau: r = 12 au Gap in the Compact Dust Disk around T Tau N
• An asymmetric dust ring around a very low mass star ZZ Tau IRS
• DBNets: A publicly available deep learning tool to measure the masses of young planets in dusty protoplanetary discs
• Gap Opening and Inner Disk Structure in the Strongly Accreting Transition Disk of DM Tau
• Extreme Pebble Accretion in Ringed Protoplanetary Discs
• Lyman-alpha Scattering Models Trace Accretion and Outflow Kinematics in T Tauri Systems
• PRODIGE -- Planet-forming disks in Taurus with NOEMA. I. Overview and first results for 12CO, 13CO, and C18O
• Astrometric view of companions in the inner dust cavities of protoplanetary disks
• exoALMA XIX: Confirmation of Non-thermal Line Broadening in the DM Tau Protoplanetary Disk