The frequent speed of light bursts unusually presents itself in a “blinking” pattern in a series of different pulses over the near hour. They range from 370 milliseconds to up to 50 seconds in real time — some are long and bright while others are fast and weak.
“It’s most likely a very unusual neutron star,” Caleb and Lenc added — and they “can’t rule out other possibilities.”
There is a mysterious radio frequency reaching Earth from the far stretches of space. South African Radio Astronomy Observatory
“Similar patterns have been seen in neutron stars, but our current understanding of neutron stars suggests they should not be able to have such a long period.”
The signal was first found by the telescope ASKAP J1935+2148 — the numbers reflect the position in space it points towards — as it searched for gamma rays and searched for pulses from a fast radio burst.
“We don’t know how long ASKAP J1935+2148 has been emitting radio signals, as radio astronomy surveys don’t usually search for objects with periods this long.”
Researchers are hoping this will shed new light on how we investigate space signals. South African Radio Astronomy Observatory (SARAO)
If not a neutron star, signs point to a white dwarf star — “the Earth-sized cinder of a burnt-out star that has exhausted its fuel” — as the second most likely source.
It could also be part of a system where either a neutron or white draw star is orbiting another star that cannot be seen.
“This object might prompt us to reconsider our decades-old understanding of neutron stars or white dwarfs, particularly in how they emit radio waves and what their populations are like within our galaxy.”
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