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Auroras Occur On Alien Worlds Somewhere In The Universe

22 January, 2013


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MessageToEagle.com - Planetary scientists of the University of Leicester have found new evidence suggesting auroras Earth's Aurora Borealis, occur outside our solar system.

Auroras occur on several planets within our solar system, and the brightest - on Jupiter - are 100 times brighter than those on Earth. However, no auroras have yet been observed beyond Neptune.

According to a new study, observed emissions are strikingly similar to those which power Jupiter's auroras could be responsible for radio emissions detected from a number of objects outside our solar system.


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The radio emissions are powerful enough to be detectable across interstellar distances - meaning that auroras could provide an effective way of observing new objects outside our solar system.

Auroras occur when charged particles in an object's magnetosphere collide with atoms in its upper atmosphere, causing them to glow. However, before hitting the atmosphere, these particles also emit radio waves into space.

The study, Origin of Electron Cyclotron Maser Induced Radio Emissions at Ultracool Dwarfs: Magnetosphere-Ionosphere Coupling Currents, which recently appeared in the Astrophysical Journal, shows that this phenomenon is not limited to our solar system.

It shows that the radio emissions from a number of ultracool dwarfs may be caused in a very similar, but significantly more powerful, way to Jupiter's auroras.

"We have recently shown that beefed-up versions of the auroral processes on Jupiter are able to account for the radio emissions observed from certain "ultracool dwarfs" - bodies which comprise the very lowest mass stars - and "brown dwarfs" - 'failed stars' which lie in between planets and stars in terms of mass," University of Leicester researcher Jonathan Nichols said.

"These results strongly suggest that auroras do occur on bodies outside our solar system, and the auroral radio emissions are powerful enough - one hundred thousand times brighter than Jupiter's - to be detectable across interstellar distances."

The paper, Origin of Electron Cyclotron Maser Induced Radio Emissions at Ultracool Dwarfs: Magnetosphere-Ionosphere Coupling Currents recently appeared in the Astrophysical Journal.

MessageToEagle.com via NASA

See also:
Fermi Detects Unknown Objects Producing Gamma Rays

No Empty Space In The Universe - Dark Matter Fills The Intergalactic Space

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