The mm-colors of a young binary disk system in the Orion Nebula Cluster

Abstract

We present new EVLA continuum observations at 7 mm of the 253-1536 binary disk system in the Orion Nebula Cluster. The measured fluxes were combined with data in the sub-mm to derive the millimeter spectral index of each individual disk component. We show how these observations can be used to test the models of dust evolution and early growth of solids in protoplanetary disks. Our analysis indicates that the disk with lower density and higher temperature hosts larger grains than the companion disk. This result is the opposite of what predicted by the dust evolution models. The models and observational results can be reconciled if the viscosity $\alpha$-parameter differs by more than a factor of ten in the two disks, or if the distribution of solids in the disks is strongly affected by radial motions. This analysis can be applied to future high-angular resolution observations of young disks with EVLA and ALMA to provide even stronger observational constraints to the models of dust evolution in protoplanetary disks.

7 pages, 2 figures, Accepted for publication in ApJ Letters Special Issue on early EVLA results

References in corpus (11)

• Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks
• Gas- and dust evolution in protoplanetary disks
• The Expanded Very Large Array -- a New Telescope for New Science
• A Submillimeter View of Circumstellar Dust Disks in $\rho$ Ophiuchus
• Dust size distributions in coagulation/fragmentation equilibrium: Numerical solutions and analytical fits
• Dust grain growth in rho-Ophiuchi protoplanetary disks
• A Multi-color Optical Survey of the Orion Nebula Cluster. II. the H-R diagram
• Testing the theory of grain growth and fragmentation by millimeter observations of protoplanetary disks
• Tracing the young massive high-eccentricity binary system Theta 1 Orionis C through periastron passage
• A Submillimeter Array Survey of Protoplanetary Disks in the Orion Nebula Cluster
• The (sub-)millimeter SED of protoplanetary disks in the outskirts of the Orion Nebula Cluster

Cited by in corpus (6)

• The effect of local optically thick regions in the long-wave emission of young circumstellar disks
• Protoplanetary Disk Masses in the Young NGC 2024 Cluster
• ALMA observations of a misaligned binary protoplanetary disk system in Orion
• Influence of grain growth on the thermal structure of protoplanetary discs
• Steepening of the 820 micron continuum surface-brightness profile signals dust evolution in TW Hya's disk
• Planet formation in intermediate-separation binary systems