Physicist Aurora Its colorful Skyglow, also known as the Aurora, is the result of dangerous electrons “surfing” across the universe in powerful party waves. The team’s findings were published in a fully tubular science journal on June 7. Nature Communications..
Scientists have known for some time that particles energized by the Sun soar across the universe and generate an aurora when they collide. EarthMagnetosphere.Those energized particles ride on our planet magnetic field Lines to the upper atmosphere where they collide oxygen And nitrogen Molecules, in the process, emit dazzling colored light.
But there is still a big, protracted question about the aurora process: how do those sun particles pick up enough speed and energy to collide with the Earth’s atmosphere with such force?
One of the general explanations is the Alfven wave. This is a powerful geomagnetic wave that propagates through the plasma, which is the charged gas that makes up the solar wind.
These waves plasma And it accelerates them to very high speeds (faster than 45 million mph, or 72 million km / h) without going off course. Space-based instruments have detected Alfven waves traveling over the aurora toward Earth, but scientists lacked a clear way to prove that these waves are accelerating electrons. -until now.
In a new study, researchers used a device called the Large Plasma Device (LPD), a 65-foot (20-meter-long) vacuum chamber at UCLA that could hold a magnetic field, to create Alfven waves under similar conditions. I reproduced it. In the solar wind. The team measured the speed of the electrons moving in the plasma chamber and found that a small number of electrons were actually accelerated by the waves at high speed.
The effect on electrons is “similar to a surfer catching a wave and continuously accelerating as the surfer moves along the wave,” said the study’s co-author, Associate Professor of Physics at the University of Iowa. Greg Howes said. Said in a statement..
According to the researchers, the team’s experimental results are in perfect agreement with the mathematical model of the surfing effect of this wave and computer simulation, providing the first “conclusive” proof that the Alfven wave is powering the aurora. Did. Kawabunga!
Originally published in Live Science.
Discover new research where electrons “surf” across the universe to create aurora
Source link Discover new research where electrons “surf” across the universe to create aurora