Odd Radio Circles, aka ORCs

New Radio Images of Bizarre “Odd Radio Circles” Which are Vastly Bigger Than the Milky Way

Quote:

Based on the observations, the light is consistent with that of synchrotron radiation. This occurs when charged particles are caught within a magnetic field. As the particles spiral along magnetic field lines, they emit a faint radio light. This often occurs with diffuse plasma, and it suggests a spherical shell gas was pushed away from the galaxy either through a rapid period of star production or the merger of supermassive black holes.

Follow the link to see the latest hi-res image. The idea that they might be the remnant of the merger of supermassive black holes intrigues me.

via International Skeptics Forum https://ift.tt/b3Vxj69