2-6 September 2024
CJD Bonn Castell
Europe/Berlin timezone
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Contribution

CJD Bonn Castell

Modelling the jet structure of the blazar NRAO 150 using mm-VLBI

Speakers

  • Lena DEBBRECHT

Primary authors

Content

NRAO 150 is a prominent radio to millimetre emitting quasar at redshift $z=1.52$. This source exhibits a particularly intriguing structure, as the jet is seen at an extremely small angle to the line of sight. Previous Very Long Baseline Interferometry (VLBI) observations have revealed a fast counter-clockwise rotation of its innermost jet region. Owing to the high angular resolution provided by VLBI, we can probe relativistic jets at such small scales, in the vicinity of the central engine. In this work, we aim to study the morphology and kinematic behaviour of the jet of NRAO 150. The source was observed by the Global Millimeter VLBI Array (GMVA) at 86 GHz, and by the European VLBI Network (EVN) at 43 GHz and 22 GHz. The data was imaged in total intensity and geometric model fitting was applied, in order to perform a comprehensive analysis of the jet structure. We report a counter-clockwise jet rotation for one emission feature, which is consistent with previous VLBI studies. We also present a new kinematic model for this source and fit a helical model to the component's trajectory. The fit supports the assumption of a counter-clockwise jet rotation. Geometric projection effects also need to be taken into account, as the source points at a small angle to our line of sight. In this talk we will examine and discuss possible scenarios for these projection effects and interpret how they relate to the observed jet features.