Combined power of two telescopes is helping crack the mystery of eerie rings in the sky
, a partnership of three South African universities.
First was the object’s internal structure, revealed for the first time due to MeerKAT’s deep sensitivity and high resolution. We can now see ORC1 contains multiple arcs, a radio source where the central galaxy is located, and knots of radio emission associated with other galaxies within the vicinity.
All light from the electromagnetic spectrum is polarised: its magnetic and electric fields are oriented in a certain direction. However,from an unpolarised source of light are randomly polarised – they do not tend toward any particular orientation. Typically, spectral index is measured with several radio telescopes combined, each observing at a different frequency that one can compare to see how the brightness changes.
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