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Title: GROWTH OF GRAINS IN BROWN DWARF DISKS

We perform coagulation and fragmentation simulations using the new physically motivated model by Garaud et al. to determine growth locally in brown dwarf disks. We show that large grains can grow and that if brown dwarf disks are scaled-down versions of T Tauri disks (in terms of stellar mass, disk mass, and disk radius) growth at an equivalent location with respect to the disk truncation radius can occur to the same size in both disks. We show that similar growth occurs because the collisional timescales in the two disks are comparable. Our model may therefore potentially explain the recent observations of grain growth to millimeter sizes in brown dwarf disks, as seen in T Tauri disks.
Authors:
 [1] ;  [2] ;  [3]
  1. Institut fuer Astronomie, ETH Zuerich, Wolfgang-Pauli-Strasse 27, 8093 Zuerich (Switzerland)
  2. Institute of Theoretical Physics, Universitaet Zuerich, Winterthurerstrasse 190, 8057 Zuerich (Switzerland)
  3. Astronomisches Rechen-Institut (ARI), Zentrum fuer Astronomie Universitaet Heidelberg, Moenchhofstrasse 12-14, D-69120 Heidelberg (Germany)
Publication Date:
OSTI Identifier:
22136556
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 774; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DWARF STARS; FRAGMENTATION; GRAIN GROWTH; MASS; MATTER; PROTOPLANETS; SIMULATION