Centaurus A in the spotlight: Plasma simulations reproduce black hole jets' mysterious bright edges

The study claims that plasma simulations of Centaurus A's jets reproduce the mysterious bright edges observed in the galaxy. The research, published in Astronomy & Astrophysics, explains that the jets are brighter at their edges than at their centers, a phenomenon that has puzzled scientists for decades. The Würzburg team found that the brightness depends on the orientation of magnetic field lines in the jet, creating bright edges and a dark core. The simulations connect microscopic plasma effects with large-scale structures, agreeing exceptionally well with EHT observations at 1.3 mm wavelength. The study highlights the importance of including realistic plasma physics in models and the potential for future telescopes to reveal more plasma signatures. The research is part of the DFG Research Unit "Relativistic Jets in Active Galaxies" (FOR 5195), which combines observations, simulations, and plasma physics. The findings suggest that such processes may be common in relativistic jets throughout the universe. The study also emphasizes the role of high-resolution observations and numerical simulations in understanding black hole physics and particle acceleration. The research is expected to pave the way for new models that improve our understanding of the universe's most powerful particle accelerators.

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