Brown dwarf or massive exoplanet detected with powerful magnetic field

Brown dwarf or massive exoplanet detected with powerful magnetic field

Brown dwarf or massive exoplanet detected with powerful magnetic field

They're dubbing it "rogue" because it's mysteriously "drifting" through space without any kind of orbit around a parent star.

A freaky rogue planet without a star is roaming the Milky Way just 20 light-years from the Sun.

The object, which is now around 20 light years from Earth, is more than 12 times the size of Jupiter. "It probably has its share of surprises that can help us understand the magnetic processes taking place on countless stars and planets", said astrophysicist Melodie Kao.

Brown dwarfs are too big to be considered planets, but aren't yet big enough to be considered stars, putting them right in the middle.

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Astronomers originally came to the conclusion that the object was a brown dwarf because of its mass and because it does not revolve around a star like a planet typically does.

Despite its weight, the newly discovered planet has a radius only 1.2 times that of Jupiter, the study said. Its surface seems to be about 825 degrees Celsius, while the Sun's surface reaches the 5,500. This fits with the object being between a planet and a brown dwarf and could provide valuable information about both groups.

Brown dwarfs were predicted to exist all the way in the 1960s, but the first one was only discovered in 1995, confirming the initial theories.

Scientists using a radio-telescope array have spotted a big roaming cosmic body with an abnormally strong magnetic field.

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The site is called SIMP J01365663+0933473, it has a magnetic field is 200 times more powerful than the magnetic field of Jupiter. Scientists detected the enormous planet from the USA -based Very Large Array observatory.

Researchers believe the rogue planet is quite young, estimating its age at around 200 million years.

Brown dwarf masses are notoriously hard to measure, and at the time, the object was thought to be an old and much more massive brown dwarf.

At the same time, the team from Caltech, which originally registered the radio emission in 2016, I watched it again during the new study, at much higher RF frequencies, and confirmed that the magnetic field of the object was even stronger than originally thought. "We think these mechanisms can work not only in brown dwarfs, but also in both gas giant and terrestrial planets". Researchers aren't sure how brown dwarf auroras happen - "rogue" planets like these lack a nearby star's solar wind for the magnetic field to interact with.

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Though this makes brown dwarfs really puzzling, the team believes further observation of this object could provide more insight into the formation of auroras.

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