New Radio Images of Bizarre 'Odd Radio Circles' Which are Vastly Bigger Than the Milky Way: by BrianKoberlein
New Radio Images of Bizarre “Odd Radio Circles” Which are Vastly Bigger Than the Milky Way
Known as Odd Radio Circles, or ORCs, they are roughly a million light-years across, which is about ten times wider than the Milky Way. Observations show that ORCs are centered around an elliptical galaxy, which suggests a galactic connection. It has been suggested that ORCs are formed by shock waves triggered by a powerful event such as a gamma-ray burst or fast radio burst, but given the size of ORCs, these events would need to have been triggered very far in the past.
The first ORC image and this latest image . Credit: The EMU team, using ASKAP and MeerKAT radio continuum data
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