Astronomers baffled as mysterious object near Earth unleashes giant burst of energy

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The object is estimated to be roughly around 4,000 light-years away from Earth and observations have found it releases a giant burst of energy three times an hour. Astronomers believe this could be a neutron star or a white dwarf with an ultra-powerful magnetic field.

The strange object sends out a beam of radiation and for one minute in every 20, it is one of the brightest objects in the night sky.

Astrophysicist Dr Natasha Hurley-Walker, from the Curtin University, International Centre for Radio Astronomy Research (ICRAR) in Australia, led the team who found the object.

She said: “This object was appearing and disappearing over a few hours during our observations.

“That was completely unexpected.

“It was kind of spooky for an astronomer because there’s nothing known in the sky that does that.

“And it’s really quite close to us — about 4,000 light-years away.

“It’s in our galactic backyard.”

The expert added how the observations matched a predicted astrophysical object called an “ultra-long period magnetar”.

She continued: “It’s a type of slowly spinning neutron star that has been predicted to exist theoretically.

“But nobody expected to directly detect one like this, because we didn’t expect them to be so bright.

“Somehow it’s converting magnetic energy to radio waves much more effectively than anything we’ve seen before.”

The researchers are now monitoring the object to see if it switches back on.

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Dr Hurley-Walker added: “If it does, there are telescopes across the Southern Hemisphere and even in orbit that can point straight to it.

“More detections will tell astronomers whether this was a rare one-off event or a vast new population we’d never noticed before.”

Tyrone O’Doherty, a student at Curtain University, discovered the “spooky” object by using the Murchison Widefield Array (MWA) telescope.

He added: “It’s exciting that the source I identified last year has turned out to be such a peculiar object.

“The MWA’s wide field of view and extreme sensitivity are perfect for surveying the entire sky and detecting the unexpected.”

While objects turning on and off in the universe are not new, co-author Dr Gemma Anderson said this discovery was unusual as it turned on for just a minute.

She said the object was incredibly bright and smaller than the sun but emitted radio waves that suggested it had an extremely strong magnetic field.

Dr Anderson said that “when studying transients, you’re watching the death of a massive star of the activity of the remnants it leaves behind”.

The new discovery was published in the journal Nature.

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