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A massive "rogue" plan with unexplained aurora glow discovered far beyond our solar system



A planet that is 12 times more massive than Jupiter was driven through space about 20 light-years from Earth alone.

The "Rogue" object is not assigned to a star and the first of its kind can be discovered using a radio telescope from Earth.

Both its mass and the enormous strength of its magnetic field challenge what scientists know about the variety of astronomical objects in the depths of space.

"This object is right on the border between a planet and a brown dwarf, or 'failed star', and gives us some surprises that can help us to understand magnetic processes on stars and planets." said Dr. Melody Kao, an astronomer at Arizona State University.

Brown dwarfs are hard to categorize objects – they are too big to be considered planets and not big enough to be considered stars.

Originally in 2016 with the Very Large Array (VLA) in New Mexico, the newly identified planet was initially considered a brown dwarf.

There is still much to be known about these astronomical bodies – the first was observed only in 1995 – and the scientists behind the discovery sought to understand more about the magnetic fields and radio emissions of five brown dwarfs

However, when another team records the data Looking at brown dwarfs, they realized that one of the objects, SIMP J01365663 + 0933473, was much younger

His age meant that they had found a free-floating planet instead of a "failed star."

The limit often used to distinguish a massive gas giant plant from a brown dwarf is the deuterium "burn limit" – the mass below which the element deuterium is no longer fused in the core of the objects.

This limit is 13 Jupiter's masses, so at 12.7 the newly identified planet strokes directly against it.

So was founded Dr. Kao had taken measurements of the magnetic field of this distant object – the first such measurements for a planetary mass object outside our solar system.

"When it became known that SIMP J01365663 + 0933473 had a mass near the deuterium firing limit, I had just analyzed its latest VLA data," she said.

Similar to the northern lights seen by the Northern Lights It is well known that the Earth, this planet and some brown dwarfs have Aurors – despite the lack of solar winds that are known to drive them.

It is the radio signature of this Auroras that allowed the researchers to discover these distant objects the first place, but it is still unclear how they are formed.

However, the research team's analysis showed that the planet's magnetic field is incredibly strong, about 200 times stronger than that of Jupiter, and this may explain why it is also a strong aurora.

"This particular object is exciting because the study of its magnetic dynamomechanisms can give us new insights on how the same kind of mechanisms in extrasolar planets – planets beyond our solar system – can work," Dr. Kao.

"We think these mechanisms can work not only in brown dwarfs, but also in gas giants and terrestrial planets," she said.

Her research was published in The Astrophysical Journa l.

The scientists said their study shows that auroral radio emissions can be used to detect more planets outside our solar system, including more rogues that are not attached to stars.


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