Into the void - Simulations of magnetic outflows from young disks at launching and observable scales

​Jon Ramsey, University of Copenhagen

​Abstract:

It is generally accepted that magnetic fields are responsible for launching and collimating large-scale outflows from disks and young stars. Although there is a continual discussion regarding the launching and collimation of protostellar jets, simulations which explicitly and intentionally resolve the launching mechanism have previously not extended far into the observational regime. I will present ideal MHD adaptive mesh refinement simulations of protostellar jets that include both the launching region (< 1 AU) and the much larger observable length scales (> 1000 AU). By varying only the initial magnetic field strength, I find that magneto-centrifugal and magnetic tower launching mechanisms work together to launch and accelerate protostellar jets, and this has consequences for the resulting observable properties of outflows. I also find that, regardless of the initial magnetic field strength, a jet is (eventually) always launched.

Category Seminar
Location: Seminarierum, seminar room, Seminarie- och biblioteksbyggnad, Onsala rymdobservatorium
Starts: 14 September, 2017, 15:30
Ends: 14 September, 2017, 16:30

Published: Mon 11 Sep 2017.