DOI

https://doi.org/10.48717/1e6t-r256

Project

EM145

Title

Intermed. Radio Structure J1955+5131

Abstract

J1955+5131 (z=1.223) is a core-dominated QSO blazer hosting powerful relativistic jet outflows and extended FRII-like outer lobes (LAS 16"). The core and inner radio jet have been extensively studied showing motion of up to 260uas/yr (~16c) from MOJAVE VLBA 15GHz imaging. Thus far no high angular resolution, high fidelity imaging of the intermediate radio structure (~100mas) has been attempted. MERLIN images from 1992 detect a bright knot in the inner one-sided jet ~260mas from the core, and VLA images show a secondary knot in the northern lobe just over half-way to the termination hotspot. In association with a deep e-MERLIN(+VLA) C-Band proposal (CY10202), we request 8-hr at L-Band to investigate the nature of the intermediate-scale jet and how this relates to the inner and outer-scales. Science goals include investigating the nature of the 260mas knot through high resolution imaging (CY10202 is searching for motion over a 28-year baseline) and whether there is any evidence of interrupted/restarted AGN activity from the high resolution structure of the secondary knot ~5 arcseconds North of the core. This project is intended as a candidate MSc programme.