- evn2024@mpifr.de
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Contribution
Speakers
- Luca RICCI
Primary authors
- Luca RICCI ()
Co-authors
- Prof. Eduardo ROS ()
- Dr. Antxon ALBERDI (IAA-CSIC)
- Prof. Matthias KADLER (Universitaet Wuerzburg)
- Dr. Guang-Yao ZHAO (MPIfR)
- Joana Anna KRAMER ()
- Sebastiano Daniel VON FELLENBERG ()
- Michael JANSSEN ()
- Florian RÖSCH ()
- Florian EPPEL ()
Content
The formation of relativistic jets from active galactic nuclei remains a subject of intense debate. Despite significant advances in understanding the underlying mechanisms, numerous questions remain. To address them, high-angular-resolution observations performed with the very long baseline interferometry (VLBI) technique are needed. In this context, we present preliminary results on 4C +01.28 (B1055+018), a blazar that shows a relevant correlation between emission at radio and gamma-ray wavelengths, and whose previous VLBI observations highlight the presence of a remarkable jet stratification. The latter consists of an inner spine with a transverse magnetic field and a distinct boundary layer - the sheath - with a longitudinal magnetic field. Exploring the properties of this unique jet stratification, alongside the jet magnetization on sub-parsec and parsec scales, is key to unlocking the secrets of the jet launching mechanisms in such a source. Thanks to the synergy between VLBI maps at various frequencies, including new 86 GHz GMVA and 230 GHz EHT observations, and relativistic MHD numerical simulations, 4C +01.28 offers an excellent opportunity for testing state-of-the-art models of jet formation.