A mechanism for triple-ridge emission structure of AGN jets

Taiki Ogihara, Kazuya Takahashi, Toma Kenji

Research output: Contribution to journalConference articlepeer-review


Recent radio very long baseline interferometry (VLBI) observations reveal a triple-ridge emission structure of the relativistic jet in M 87 radio galaxy that consists of the conventional limb-brightened feature and a narrow central ridge. Motivated by these observations, we examine a steady axisymmetric force-free model of a jet driven by the central black hole with its electromagnetic structure being consistent with general relativistic magnetohydrodynamic (GRMHD) simulations, and shown that the model with a velocity field associated with the electromagnetic field and a simple Gaussian distribution of emitting electrons at the jet base can produce the triple-ridge structure. This study will be complementary to theoretical analyses of the future observations of active galactic nucleus (AGN) jets.

Original languageEnglish
Article number074
JournalProceedings of Science
Publication statusPublished - 2019
Event7th High Energy Phenomena in Relativistic Outflows, HEPRO 2019 - Barcelona, Spain
Duration: 2019 Jul 92019 Jul 12


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