11-15 May 2020
Leibniz Institute for Astrophysics Potsdam (AIP)
Europe/Berlin timezone

TACOs, thermally-assisted (magneto-)centrifugal outflows

12 May 2020, 14:20
Lecture Hall (Leibniz Institute for Astrophysics Potsdam (AIP))

Lecture Hall

Leibniz Institute for Astrophysics Potsdam (AIP)

An der Sternwarte 16 14482 Potsdam, Germany
Oral presentation Main conference Disk Thermodynamics & Magnetothermal Winds


Oliver Gressel (AIP)


Laminar outflows driven by large-scale magnetic fields likely play an important role in the evolution and dispersal of protoplanetary disks, and in setting the conditions for planet formation. Extending our previous non-ideal MHD model with radiative transfer as well as a simplified thermochemistry, we follow the dual aim of studying the influence of thermal driving and, at the same time, laying the foundation for synthetic observations. Our simulations develop magnetocentrifugal outflows that are primarily driven by magnetic tension forces. As a consequence, the mass-loss rate in the wind only increases moderately when including thermochemical effects. For typical field magnitudes, magnetic dissipation heating remains sub-dominant compared with thermochemical and irradiation heating. We, moreover, follow the evolution of the entrained vertical magnetic flux and find it to diffuse out of the disk on secular timescales as a result of non-ideal MHD. Based on line-radiative post processing, we demonstrate that velocity spectra and moment 1 maps of O and CS (as well as other molecules) show significant, potentially observable differences between models with and without outflows. In particular the shape of the line profiles, and velocity asymmetries in the moment 1 maps could enable the identification of outflows emanating from the surface of a disk.

Primary authors

Oliver Gressel (AIP) Jon Ramsey (Virginia Initiative on Cosmic Origins, Department of Astronomy, University of Virginia) Dr Christian Brinch (DTU National Food Institute) Richard Nelson (Queen Mary University of London) Neal Turner (Jet Propulsion Laboratory, California Institute of Technology) Simon Bruderer (Max-Planck-Institut für extraterrestrische Physik) Prof. E.F. van Dishoeck (Leiden University, Max-Planck-Institut für Extraterrestrische Physik)

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