Coronal emissions on the Sun spotted in their “footprints”

11 months ago

Scientists have figured out how to automatically track the signs of coronal emissions on the Sun, which can cause problems in the operation of electrical devices on Earth, as well as threaten spacecraft and the inhabitants of the ISS. This was written by the press service of the Skolkovo Institute of Science and Technology with reference to an article in the Astrophysical Journal.

Coronal mass ejections are one of the most striking manifestations of solar activity. They are huge clouds of plasma that leave the atmosphere of the Sun at speeds from 300 to 3500 km / s. If such a cloud reaches the Earth, auroras and geomagnetic storms occur, which can provoke interference in the operation of communication satellites, transformers, pipelines, as well as affect the health of passengers of jet aircraft and astronauts.

At the same time, such emissions can be monitored and predicted only with the help of special tools – coronographs. However, the readings of coronographs that work on Earth are not accurate enough, and in space there are only two such devices now – on board the STEREO-A and SOHO satellites. At the same time, coronographs have one more drawback: they can detect such an ejection only at a developed stage, and its early evolution with the help of such devices cannot be seen.

To solve this problem, the researchers proposed to study not the coronal ejection itself, but its “traces” on the Sun – coronal dimmings. If you observe the solar corona in the ultraviolet range, then you can see the gaps in the intensity – dark spots that are associated with the loss of matter in the corona during the discharge of plasma. These are dimmings.

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