DOI

https://doi.org/10.48717/2fzt-v239

Project

GM079

Title

Unravelling the Nature of the Jets Magnetic Field within PKS 1510-089

Abstract

*This proposal is a re-submission of the project: G19B002, which had been conditionally approved by the EVN in 2019 but was cancelled due to the 86 and 230 GHz ALMA proposals being rejected on a font size technicality (*now corrected for Cycle8). // We propose using EVN+VLBA observations at 43 GHz to map the polarized emission emanating from the gamma-ray bright blazar PKS 1510-089, in an effort to discern whether the jet is magnetically disordered or ordered on the pc-scales probed by global VLBI. PKS 1510-089, along with a number of other blazars, has exhibited prominent orphan gamma-ray flaring behavior that can be explained by disordered turbulence in the jet spine or inverse-Compton scattering of photons emanating from regions of ordered magnetic field in the jet sheath. Determining the nature of the magnetic field within PKS 1510-089 using the high resolution (and sensitivity) afforded by a combined 43 GHz EVN+VLBA array, in concert with proposed near-in-time 23 GHz EVN+VLBA, 86 GHz GMVA+ALMA, and 230 GHz EHT+ALMA observations will help discriminate between models of blazar emission that have been developed to explain this high-energy variability.