The mm-colors of a young binary disk system in the Orion nebula cluster

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DOIResolve DOI: http://doi.org/10.1088/2041-8205/739/1/L8
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TypeArticle
Journal titleThe Astrophysical Journal Letters
ISSN2041-8205
Volume739
Issue1
PagesL8-1L8-5; # of pages: 5
Subjectcircumstellar matter; planets and satellites: formation; protoplanetary disks; submillimeter: planetary systems
AbstractWe 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.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Herzberg Institute of Astrophysics
Peer reviewedYes
NPARC number19709161
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Record identifier590dc477-61ab-4184-95c8-e0f7c3cc17df
Record created2012-03-23
Record modified2016-05-09
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