A Magnetized Jet from a Massive Protostar
  Synchrotron emission is commonly found in relativistic jets from active
galactic nuclei (AGNs) and microquasars, but so far its presence in jets from
young stellar objects (YSOs) has not been proved. Here, we present evidence of
polarized synchrotron emission arising from the jet of a YSO. The apparent
magnetic field, with strength of ~0.2 milligauss, is parallel to the jet axis,
and the polarization degree increases towards the jet edges, as expected for a
confining helical magnetic field configuration. These characteristics are
similar to those found in AGN jets, hinting at a common origin of all
astrophysical jets.
