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Sub-kpc radio jets in the brightest central galaxy of the cool-core galaxy cluster RXJ1720.1+2638

Yvette C. PerrottGopika SMAlastair C. EdgeKeith J. B. GraingeDavid A. GreenRichard D. E. Saunders
Nov 2022
摘要
The cool-core galaxy cluster RXJ1720.1+2638 hosts extended radio emissionnear the cluster core, known as a minihalo. The origin of this emission isstill debated and one piece of the puzzle has been the question of whether thesupermassive black hole in the brightest central galaxy is actively poweringjets. Here we present high-resolution e-MERLIN observations clearly indicatingthe presence of sub-kpc jets; this may have implications for the proposedorigin of the minihalo emission, providing an ongoing source of relativisticelectrons rather than a single burst sometime in the past, as previouslyassumed in simulations attempting to reproduce observational characteristics ofminihalo-hosting systems.
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