The LOFAR DR3 survey yields 18 odd radio circles, confirming their rarity, heterogeneity, association with large ellipticals, and a relation where smaller ORCs avoid steep spectra.
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Single- and double-headed odd radio circles in the LOFAR surveys
The LOFAR DR3 survey yields 18 odd radio circles, confirming their rarity, heterogeneity, association with large ellipticals, and a relation where smaller ORCs avoid steep spectra.