What high-velocity structures are expelled outward from the poles of a protostar?

Answer

Bipolar outflows or jets

While drawing in material from the accretion disk, the protostar simultaneously expels material out the poles in high-speed, narrow streams known as bipolar outflows or jets, thought to be generated by magnetic fields.

What high-velocity structures are expelled outward from the poles of a protostar?
protostarstar formationastrophysicsenergy generation