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Title: THE mm-COLORS OF A YOUNG BINARY DISK SYSTEM IN THE ORION NEBULA CLUSTER

Abstract

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 {alpha}-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.

Authors:
;  [1];  [2];  [3];  [4]
  1. European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching (Germany)
  2. Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)
  3. National Research Council Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7 (Canada)
  4. Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg (Germany)
Publication Date:
OSTI Identifier:
21565474
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 739; Journal Issue: 1; Other Information: DOI: 10.1088/2041-8205/739/1/L8; Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DUSTS; EVOLUTION; NEBULAE; PROTOPLANETS

Citation Formats

Ricci, L., Testi, L., Williams, J. P., Mann, R. K., and Birnstiel, T., E-mail: lricci@eso.org. THE mm-COLORS OF A YOUNG BINARY DISK SYSTEM IN THE ORION NEBULA CLUSTER. United States: N. p., 2011. Web. doi:10.1088/2041-8205/739/1/L8.
Ricci, L., Testi, L., Williams, J. P., Mann, R. K., & Birnstiel, T., E-mail: lricci@eso.org. THE mm-COLORS OF A YOUNG BINARY DISK SYSTEM IN THE ORION NEBULA CLUSTER. United States. doi:10.1088/2041-8205/739/1/L8.
Ricci, L., Testi, L., Williams, J. P., Mann, R. K., and Birnstiel, T., E-mail: lricci@eso.org. Tue . "THE mm-COLORS OF A YOUNG BINARY DISK SYSTEM IN THE ORION NEBULA CLUSTER". United States. doi:10.1088/2041-8205/739/1/L8.
@article{osti_21565474,
title = {THE mm-COLORS OF A YOUNG BINARY DISK SYSTEM IN THE ORION NEBULA CLUSTER},
author = {Ricci, L. and Testi, L. and Williams, J. P. and Mann, R. K. and Birnstiel, T., E-mail: lricci@eso.org},
abstractNote = {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 {alpha}-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.},
doi = {10.1088/2041-8205/739/1/L8},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 739,
place = {United States},
year = {2011},
month = {9}
}