Molina, Sol N.

Evidence for internal rotation in the jet of the quasar NRAO150.

Author list: Sol N. Molina, Iván Agudo, Jose L. Gómez, Thomas Krichbaum

Multi-epoch extremely-high angular resolution VLBI observations allow to study the innermost regions of AGN jets through which obtain a better understanding of the relationship between the supermassive black hole, accretion disk and jet. Several sources have shown a progressive rotation of the structural position angle in the plane of the sky, being the quasar NRAO150 an extreme case, with a projected counter-clock-wise jet swing of 11 degrees per year when referred to a component assumed to remain stationary (the hypothetical core). We present new multi-epoch 8, 15, 22, and 43 GHZ VLBA, as well as 86 GHz GMVA observations of NRAO150 between 2006 and 2010. On the light of the new data we present an alternative model to the jet swing, in which the jet is viewed face-on and all the detected components trace a helical path around an auto-absorbed (non-detected) core coincident with the apex of the jet cone.