DEC 01, 2020 5:54 AM PST

"Killer" electrons associated with the pulsating aurora

In a collaboration between scientists in Japan and the United States, a new study has been published in the journal Geophysical Research Letters explaining the physics behind the phenomenon of the pulsating aurora.

According to the findings from the computer simulations conducted by the researchers, the pulsating aurora, unlike the aurora borealis and australis, has wide-ranging energies with both low- and high-energy electrons. Seen in the sky, it looks more like wisps of clouds than the well-known sheaths of color of the aurora borealis.

The scientists hypothesize that these wide-ranging energies are a result of the interactions between chorus waves (which are plasma waves that form close to the magnetic equator) and electrons in the Earth's magnetosphere. Some of the electrons they simulated have as little energy as a few hundred kiloelectron volts, while some electrons have as much as several thousand kiloelectron volts.

These high-energy electrons are called 'megaelectron' volts, or, as the researchers refer to them: killer electrons. They earned this name because of the destruction the research team thinks they cause in the mesosphere when they collide with satellites.

Photo: Pexels

"Our theory indicates that so-called killer electrons that precipitate into the middle atmosphere are associated with the pulsating aurora, and could be involved in ozone destruction," says Yoshizumi Miyoshi from Nagoya University's Institute for Space-Earth Environmental Research.

In order to test out their theory, the team plans to use measurements from the LAMP mission, due to launch next year. LAMP (loss through auroral microburst pulsations) will hopefully provide observational data on the killer electrons.

Sources: Geophysical Research Letters, Science Daily

About the Author
  • Kathryn is a curious world-traveller interested in the intersection between nature, culture, history, and people. She has worked for environmental education non-profits and is a Spanish/English interpreter.
You May Also Like
AUG 16, 2021
Neuroscience
My Mind's a Blank! How Sleep-Like States Occur During Wakefulness
AUG 16, 2021
My Mind's a Blank! How Sleep-Like States Occur During Wakefulness
Researchers identify neural mechanism common to both attention lapses and sleeping.
AUG 19, 2021
Space & Astronomy
Researchers Observe the Birth of New Solar Systems
AUG 19, 2021
Researchers Observe the Birth of New Solar Systems
Astronomers are gaining new insights on how our solar system was born from observations of a nearby star-forming region ...
SEP 02, 2021
Chemistry & Physics
The Future of Room-Temperature Superconductors
SEP 02, 2021
The Future of Room-Temperature Superconductors
It begins with two diamonds, a pinch of carbon, sulfur, and a whiff of hydrogen gas. The result is the world’s fir ...
SEP 10, 2021
Space & Astronomy
The Future (and Ethics) of Giant Telescopes
SEP 10, 2021
The Future (and Ethics) of Giant Telescopes
The fate of giant telescopes hangs in the balance as this decade comes to an end.
SEP 22, 2021
Chemistry & Physics
Commercial Fusion Energy Could be Within Reach, Thanks to the World's Most Powerful Magnet
SEP 22, 2021
Commercial Fusion Energy Could be Within Reach, Thanks to the World's Most Powerful Magnet
Commonwealth Fusion Systems (CFS) announced this month that their new magnet might be the breakthrough needed to make fu ...
OCT 19, 2021
Space & Astronomy
A Glimpse at the Death of Our Solar System
OCT 19, 2021
A Glimpse at the Death of Our Solar System
One of the most difficult aspects of studying space is that most things, on the astronomical scale, happen very slowly. ...
Loading Comments...