Huge Planet's Aurora 200 Times as Strong as Jupiter's

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The rogue body is almost large enough to be considered a gas giant planet and it offers researchers the opportunity to study these massive objects, shedding light on their magnetic realities.

When astronomers are searching the depths of space for new objects it's typically easier to find undiscovered planets if they're orbiting a star. They say the new world is 200 million years old and 20 light-years from Earth.

Brown dwarfs, objects that are two massive be considered planets but not massive enough to sustain nuclear fusion in their cores, were first predicted in the 1960s and detected for the first time in 1995. The team's analysis showed the planet's magnetic field is around 200 times stronger than Jupiter's, and this could help explain why it also has a strong aurora.

The researchers were able to pick up on the object's magnetic activity using a powerful radio astronomy observatory called the Very Large Array, a National Science Foundation facility in New Mexico.

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In the first radio-telescope detection of a planetary-mass object beyond our solar system, astronomers have found the unusual celestial body has 12.7 times the mass of Jupiter.

Though it was first detected in 2016, scientists initially identified it as one of five recently discovered brown dwarfs.

The rogue extrasolar planetary-mass object's young age meant that it was in fact so much less massive that it could be free-floating planet - only 12.7 times more massive than Jupiter, with a radius 1.22 times that of Jupiter.

However, recent VLA observations have uncovered that SIMP J01365663+0933473 is too lightweight to be a brown dwarf.

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SIMP0136 was originally discovered in 2006 by another team of researchers, led by University of Montréal astronomer Dr. Étienne Artigau.

But as far as we know, brown dwarfs aren't in the vicinity of any stellar winds, making their auroras something of a puzzle.

Brown dwarf masses are notoriously hard to measure, and at the time, SIMP0136 was thought to be an old and much more massive brown dwarf. The boundary line is still debated, but scientists tend to draw it at about 13 times the mass of Jupiter.

Such a strong magnetic field 'presents huge challenges to our understanding of the dynamo mechanism that produces the magnetic fields in brown dwarfs and exoplanets and helps drive the auroras we see, ' said Gregg Hallinan, of Caltech.

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