The innermost regions of the jet in NRAO 150. Wobbling or internal rotation?

Abstract

NRAO 150 is a very bright millimeter to radio quasar at redshift $z$=1.52 for which ultra-high-resolution VLBI monitoring has revealed a counter-clockwise jet-position-angle wobbling at an angular speed $\sim 11^{\circ }$/yr in the innermost regions of the jet. In this paper we present new total and linearly polarized VLBA images at 43 GHz extending previous studies to cover the evolution of the jet in NRAO 150 between 2006 and early 2009. We propose a new scenario to explain the counter-clockwise rotation of the jet position angle based on a helical motion of the components in a jet viewed faced-on. This alternative scenario is compatible with the interpretation suggested in previous works once the indetermination of the absolute position of the self-calibrated VLBI images is taken into account. Fitting of the jet components motion to a simple internal rotation kinematical model shows that this scenario is a likely alternative explanation for the behavior of the innermost regions in the jet of NRAO 150.

5 pages, 4 figures, Presented in 'The Innermost Regions of Relativistic Jets and Their Magnetic Fields' conference. Granada, Spain, 2013

References in corpus (6)

• Erratic Jet Wobbling in the BL Lacertae Object OJ287 Revealed by Sixteen Years of 7mm VLBA Observations
• Superluminal non-ballistic jet swing in the quasar NRAO 150 revealed by mm-VLBI
• On the source of Faraday rotation in the jet of the radio galaxy 3C120
• An Extremely Curved Relativistic Jet in PKS 2136+141
• The milliarcsecond-scale jet of PKS 0735+178 during quiescence
• The redshift and broad band spectral energy distribution of NRAO 150