Physicists led by the University of Iowa report definitive evidence of how auroras are created. In experiments, the physicists demonstrated the physical mechanisms for the acceleration of electrons by Alfven waves under conditions corresponding to Earth¡¯s auroral magnetosphere. Photo courtesy of NASA.
See previous thread.
The aurora borealis, or northern lights, that fill the sky in high-latitude regions have fascinated people for thousands of years. But how they¡¯re created, while theorized, had not been conclusively proven.
In a new study, a team of physicists led by University of Iowa reports definitive evidence that the most brilliant auroras are produced by powerful electromagnetic waves during geomagnetic storms. The phenomena, known as Alfven waves, accelerate electrons toward Earth, causing the particles to produce the familiar atmospheric light show.
The study, published online June 7 in the journal Nature Communications, concludes a decades-long quest to demonstrate experimentally the physical mechanisms for the acceleration of electrons by Alfven waves under conditions corresponding to Earth¡¯s auroral magnetosphere.
¡°Measurements revealed this small population of electrons undergoes ¡®resonant acceleration¡¯ by the Alfven wave¡¯s electric field, similar to a surfer catching a wave and being continually accelerated as the surfer moves along with the wave,¡± says Greg Howes, associate professor in the Department of Physics and Astronomy at Iowa and study co-author.
Apologize for everyone looking for nothing except where you all got to witness the event described in previous thread....
2
To remove first post, remove entire topic.
The hyper wave payers were finally measured in the last northern light show.
University of Iowa physics department cited for discovery.
Physicists led by the University of Iowa report definitive evidence of how auroras are created. In experiments, the physicists demonstrated the physical mechanisms for the acceleration of electrons by Alfven waves under conditions corresponding to Earth¡¯s auroral magnetosphere. Photo courtesy of NASA.
See previous thread.
The aurora borealis, or northern lights, that fill the sky in high-latitude regions have fascinated people for thousands of years. But how they¡¯re created, while theorized, had not been conclusively proven.
In a new study, a team of physicists led by University of Iowa reports definitive evidence that the most brilliant auroras are produced by powerful electromagnetic waves during geomagnetic storms. The phenomena, known as Alfven waves, accelerate electrons toward Earth, causing the particles to produce the familiar atmospheric light show.
The study, published online June 7 in the journal Nature Communications, concludes a decades-long quest to demonstrate experimentally the physical mechanisms for the acceleration of electrons by Alfven waves under conditions corresponding to Earth¡¯s auroral magnetosphere.
¡°Measurements revealed this small population of electrons undergoes ¡®resonant acceleration¡¯ by the Alfven wave¡¯s electric field, similar to a surfer catching a wave and being continually accelerated as the surfer moves along with the wave,¡± says Greg Howes, associate professor in the Department of Physics and Astronomy at Iowa and study co-author.
Apologize for everyone looking for nothing except where you all got to witness the event described in previous thread....
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