Novel techniques for determining the 3D magnetic fields of interstellar clouds

11/05/2022 - 14:00 - 15:00
Remoto, com transmissão pela internet
Novel techniques for determining the 3D magnetic fields of interstellar clouds
Mehrnoosh Tahani
Dominion Radio Astrophysical Observatory, CA
The role of magnetic fields in the star-formation process is poorly understood, mainly due to significant limitations in observing three-dimensional (3D) magnetic fields in the interstellar medium (ISM). In this talk, I will discuss our work on observing 3D magnetic field morphologies associated with molecular clouds. To determine the 3D fields, we first developed a novel technique for probing the line-of-sight strength and direction of magnetic fields associated with molecular clouds, based on Faraday rotation measurements. We then incorporated our line-of-sight and Planck’s plane-of-sky magnetic field observations, along with models and statistical tools, to study the 3D magnetic field morphology associated with the Orion A cloud. Finally, we used Galactic magnetic field models to reconstruct the complete 3D magnetic field morphologies, including their direction (associated with the Orion A and Perseus clouds). I will discuss these techniques, our results, and their connection to larger ISM magnetic fields.
Mehrnoosh Tahani is a Covington Fellow at the Dominion Radio Astrophysical Observatory with the National Research Council Canada. She moved to Canada immediately after completing her undergraduate degree in Iran and earned her PhD in 2019 from the University of Calgary. Next she'll be joining Stanford University as a postdoctoral fellow.