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Large grains can grow in circumstellar discs

Meru, Farzana ; Galvagni, Marina ; Olczak, Christoph ; Garaud, Pascale

In: Proceedings of the International Astronomical Union, 2013, vol. 8, no. S299, p. 169-170

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    Titre
    • Large grains can grow in circumstellar discs
    Auteur
    • Meru, Farzana. Institut für Astronomie, ETH Zürich, Wolfgang-Pauli-Strasse 27, 8093 Zürich email: farzana.meru@phys.ethz.ch
    • Galvagni, Marina. Institute of Theoretical Physics, Universität Zürich, Winterthurerstrasse 190, 8057 Zürich
    • Olczak, Christoph. Astronomisches Rechen-Institut (ARI), Zentrum für Astronomie Universit{ä}t Heidelberg, M{ö}nchhofstrasse 12-14, 69120 Heidelberg
    • Garaud, Pascale. Department of Applied Mathematics and Statistics, UCSC, 1156 High Street Santa Cruz
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Proceedings of the International Astronomical Union, 2013, vol. 8, no. S299, p. 169-170. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:295053
    Summary
    We perform coagulation & fragmentation simulations to understand grain growth in T Tauri & brown dwarf discs. We present a physically-motivated approach using a probability distribution function for the collision velocities and separating the deterministic & stochastic velocities. We find growth to larger sizes compared to other models. Furthermore, if brown dwarf discs are scaled-down versions of T Tauri discs (in terms of stellar & disc mass, and disc radius), growth at the same location with respect to the outer edge occurs to similar sizes in both discs