Authors
M. de Juan Ovelar
P. Pinilla
M. Min
C. Dominik
T. Birnstiel
Date (dd-mm-yyyy)
2016-06-01
Title
Constraining turbulence mixing strength in transitional discs with planets using SPHERE and ALMA
Journal
Monthly Notices of the Royal Astronomical Society: Letters
Volume
459
Publication Year
2016-06-01
Issue number
1
Document type
Article
Faculty
Faculty of Science (FNWI)
Institute
Anton Pannekoek Institute for Astronomy (API)
Abstract
We investigate the effect that the turbulent mixing strength parameter αturb plays on near-infrared polarimetric and sub-millimetre interferometric imaging observations of transitional discs (TDs) with a gap carved by a planet. We generate synthetic observations of these objects with ALMA and VLT/SPHERE-ZIMPOL by combining hydrodynamical, dust evolution, radiative transfer and instrument models for values of α _{turb}=[10^{-4}, 10^{-3}, 10^{-2}]. We find that, through a combination of effects on the viscosity of the gas, the turbulent mixing and dust evolution processes, αturb strongly affects the morphology of the dust distribution that can be traced with these observations. We constrain the value of αturb to be within an order of magnitude of 10-3 in TD sources that show cavities in sub-mm continuum images while featuring continuous distribution of dust or smaller cavities in NIR-polarimetric images.
URL
go to publisher's site
Permalink
https://hdl.handle.net/11245.1/37a91c4a-63e5-4b45-972c-fd3f198f1d9e