A Highly Magnetized Twin-Jet Base Pinpoints a Supermassive Black Hole
  Supermassive black holes (SMBH) are essential for the production of jets in radio-loud active galactic nuclei (AGN). Theoretical models based on Blandford & Znajek extract the rotational energy from a Kerr black hole, which could be the case for NGC1052, to launch these jets. This requires magnetic fields of the order of $10^3\,$G to $10^4\,$G. We imaged the vicinity of the SMBH of the AGN NGC1052 with the Global Millimetre VLBI Array and found a bright and compact central feature, smaller than 1.9 light days (100 Schwarzschild radii) in radius. Interpreting this as a blend of the unresolved jet bases, we derive the magnetic field at 1 Schwarzschild radius to lie between 200 G and ~80000 G consistent with Blandford & Znajek models. 
A.-K. Baczko, R. Schulz, M. Kadler, E. Ros, M. Perucho, T.P.   Krichbaum, M. B\"ock, M. Bremer, C. Grossberger, M. Lindqvist...
astro-ph.GA astro-ph.HE