New uGMRT observations of the Ophiuchus fossil radio lobe show ultra-steep-spectrum filaments and a tentative spectral break that implies an AGN outburst about 174 Myr ago.
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The structure of the giant radio fossil in the Ophiuchus galaxy cluster
New uGMRT observations of the Ophiuchus fossil radio lobe show ultra-steep-spectrum filaments and a tentative spectral break that implies an AGN outburst about 174 Myr ago.