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April 15, 2026

RadioAstron reveals a change in the jet collimation profile of 3C 84

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Authors

PBP. BenkeTST. SavolainenGGG. Giovannini

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Overview

RadioAstron reveals changes in jet morphology and collimation in 3C 84, suggesting new insights into jet evolution.

Key Points

  • The research aims to explore the morphology, evolution, and spectral characteristics of the 3C 84 jet after its restart in 2003.
  • Utilized space-VLBI observations from RadioAstron at 22 GHz in September 2016
  • Combined with multifrequency observations from VLBI networks at 4.8, 8, 15, and 43 GHz
  • Achieved effective resolution of 58 μas to study the central region
  • Analyzed the collimation profile and changes in jet structure
  • Observed significant morphological changes in the jet over three years
  • Confirmed the existence of a limb-brightened jet and counter-jet
  • Identified a flip in the hotspot position due to VLBI monitoring
  • Collimation profile evolved from quasi-cylindrical to parabolic
  • Measured constraints on the magnetic field strength in the core region

Cite This Study

Benke et al. (2026) studied this question.

synapsesocial.com/papers/69df2b49e4eeef8a2a6b02f0https://doi.org/10.1051/0004-6361/202553859/pdf
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