Poster title: Magnetic fields and polarimetry in planet-forming disks

Poster abstract: Understanding the physical processes in planet-forming disks is vital for the understanding of planet 
formation. It has been predicted that magnetic fields are an important factor on a wide range of these physical processes, 
such as the migration of planet(esimals) and the mere evolution of disks. Yet, observational constraints are still pending. 
In the classical picture, (sub-)mm continuum polarization is the tracer for magnetic fields in disks. Aspherical dust grains, 
whose thermal emission is intrinsically polarized, get aligned by the magnetic field due to radiative torques. In recent 
years, however, this picture has been challenged. New theoretical studies show that (sub-)mm continuum polarization 
can also be created by scattering of the thermal dust emission or arise from aspherical grains which are aligned by the 
radiation field rather than the magnetic field. These three mechanisms trace fundamentally different physics in 
protoplanetary disks, yet, their polarization predictions are not clearly distinguishable. This poster gives an outlook on how 
to disentangle the sources of continuum polarimetry with ALMA by applying spectro-polarimetry. We further present the 
first predictions for linear line polarization in disks.