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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 606378.0, MPI für Astronomie / Publikationen_mpia
The mm-colors of a Young Binary Disk System in the Orion Nebula Cluster
Authors:Ricci, L.; Testi, L.; Williams, J. P.; Mann, R. K.; Birnstiel, T.
Date of Publication (YYYY-MM-DD):2011
Journal Abbrev.:The Astrophysical Journal Letters
Start Page:L8
Audience:Not Specified
Abstract / Description:We present new Expanded Very Large Array (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 submillimeter 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 is predicted by the dust evolution models. The models and observational results can be reconciled if the viscosity α-parameter differs by more than a factor of 10 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.
Free Keywords:circumstellar matter; planets and satellites: formation; protoplanetary disks; submillimeter: planetary systems
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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