MeerKAT tagged posts

Astronomers Reveal Best Image yet of Mysterious Odd Radio Circles in Space

Data from SARAO’s MeerKAT radio telescope data (green) showing the odd radio circles, is overlaid on optical and near infra-red data from the Dark Energy Survey. Credit: J. English (U. Manitoba) / EMU / MeerKAT / DES(CTIO)

Astronomy’s newest mystery objects⁠—odd radio circles, or ORCs⁠—have been pulled into sharp focus by an international team of astronomers using the world’s most capable radio telescopes.
When first revealed in 2020 by the ASKAP radio telescope, owned and operated by Australia’s national science agency CSIRO, odd radio circles quickly became objects of fascination. Theories on what causes them ranged from galactic shockwaves to the throats of wormholes.

A new detailed image, captured by the South African Radio Astronomy Observatory’s MeerKAT radio telescope and publ...
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Strange Radio Waves emerge from the direction of the Galactic Center

Artist's impression of ASKAP J173608.2-321635 by Sebastian Zentilomo
Artist’s impression of ASKAP J173608.2-321635 by Sebastian Zentilomo

A variable signal aligned to the heart of the Milky Way is tantalising scientists. Astronomers have discovered unusual signals coming from the direction of the Milky Way’s centre. The radio waves fit no currently understood pattern of variable radio source and could suggest a new class of stellar object.

“The strangest property of this new signal is that it is has a very high polarisation. This means its light oscillates in only one direction, but that direction rotates with time,” said Ziteng Wang, lead author of the new study and a PhD student in the School of Physics at the University of Sydney.

“The brightness of the object also varies dramatically, by a factor of 100, and the signal switches on and off appa...

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