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huge magnetic \'ropes\' drive powerful sun explosions

by:Newland     2019-08-30
A new study says the explosion on the surface of the sun may have been caused by huge, unstable magnetic plasma arches.
The discovery brings scientists one step closer to predicting a solar explosion that could cause serious damage to the Earth.
Astronomers have long observed huge plasma arches on the surface of the sun.
These structures are called magnetic flux cords, corona rings, and Corona, and have a spiral magnetic field line, just as a giant bar magnet is twisted into a spiral.
A large amount of current usually passes through the core of these tubes.
Scientists have always believed that magnetic flux ropes will drive mass shoot-out (CMEs)
It can cause magnetic storms, destroy satellites in space, and destroy the power grid on Earth. [
Wrath of the Sun: The worst solar storm in history
Two models involving magnetic flux ropes have emerged.
In the first model, there is a magnetic flux rope before the outbreak.
When the rope becomes unstable, it pushes the burst through a process called reconnection, in which the energy in the magnetic field of the structure is converted into kinetic energy.
In the second model, the magnetic flux rope was born at the same time as the eruption, which was caused by the reconnection within the \"Arcade\", a series of magnetic coils.
It turns out that it is difficult to know which of these models is closer to reality, because understanding the 3D nature of the solar external atmosphere or the Corona magnetic field is a big challenge.
\"This is a controversial issue for quite some time,\" said Tahar Amari, the leading research author, an astrophysicist at the Palaiseau Institute of Technology in France.
Now, take advantage of Japan\'s Hinode satellite, NASA\'s sun and the globe, and Paris-
The researchers found at the Meudon Observatory that the model involving an unstable magnetic flux rope best explained the sun burst.
Use from four-
On the day before CME on December 2006, the researchers established a model of the solar corona magnetic field.
They found that the magnetic energy was very low during the days before the eruption, but over time the magnetic energy slowly increased.
One day before the eruption of the volcano, a magnetic flux rope was formed and grown.
When the magnetic energy grows too high, the rope is squeezed up at a speed of up to 8. 9 million mph (14. 4 million km/h)
The subsequent reconnection drove CME.
\"It\'s very exciting to see the erupting form in our model and see it evolve in such a sudden way,\" Amari told Space . \". com.
\"I never dreamed of seeing it.
Another model could also trigger some sun bursts, Amari noted.
\"The problem is that the other model needs a very complex solar environment, so whether this will happen,\" said Amari . \".
\"In addition, there is also a question of whether you can create a major solar burst with another model --
You can use our model because the magnetic flux rope can store a lot of energy.
\"These findings can help astronomers predict future CMEs,\" said Amari.
\"We can monitor the activity area for a few days before the eruption --
\"It may be said whether a person will happen the day before it happens, or whether it will be a big outbreak or a small outbreak in the future,\" he noted . \".
In the future, Amari and his colleagues would like to have a better understanding of what happens deep in the sun when it breaks out, and model how the magnetic flux rope ultimately affects the Earth.
Scientists introduced their findings in detail online today. Oct. 22)
In the journal Nature
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Originally published onSpace. com.
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