ALMA Observations of Dust Polarization Toward Embedded Protostars in Ophiuchus

Sarah Sadavoy

Friday December 7th, 09:40

Magnetic fields are expected to impact the formation of protostars and their planet-forming disks. We typically use observations of dust polarization to infer the plane-of-the-sky magnetic field, but these observations are nontrivial on the scales of protostellar disks. With ALMA, we are able to make these observations toward a large sample of disks for the first time. I will present an overview of an unbiased ALMA survey of dust polarization in Ophiuchus, and showcase the first science about magnetic field structure on scales < few 100 au.