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Scientists capture the "heartbeat" of the Sun

2023-02-28 16:09:29Kosova&Bota SHKRUAR NGA REDAKSIA VOX
Scientists capture the "heartbeat" of the Sun
sun

Scientists have discovered a mysterious 'heartbeat'-like signal from our sun that repeats itself every 10 to 20 seconds.

The strange pattern was identified as a C-class solar flare located 3,106 miles above the star's surface.

These pulses, known as quasi-periodic pulsations (QPPs), have long been a mystery and source of debate among solar physicists.

The team, led by the New Jersey Institute of Technology (NJIT), said discovering the source of the heartbeat — the solar flare — could help scientists better understand how catastrophic solar storms are unleashed.

Co-author Sijie Yu, an astronomer affiliated with NJIT, said in a statement: "The discovery is unexpected.

"This pulsation pattern is important for understanding how energy is released and dissipated in the Sun's atmosphere during these extremely powerful solar flares."

Solar radio bursts are intense bursts of radio waves from the sun that are often accompanied by solar flares and are known to exhibit signals with repeating patterns.

The team determined the source of the heartbeat after analyzing microwave observations of a solar flare event on July 13, 2017, captured by NJIT's radio telescope called the Extended Owens Valley Solar Array (EOVSA).

These observations showed a repeating signal pattern, which lead author Yuankun Kou, a Ph.D. student at Nanjing University (NJU) is compared to a heartbeat.

The team identified a QPP signal at the base of the electric current sheet that extends more than 15,534 miles through the ignition region of the explosion's core, where adversaries approach each other, break apart and reconnect, generating intense energy that powers the explosion.

This is called magnetic reconnection, and this is the first time a QPP has been found in such a location.

Even more interestingly, the team discovered a second heartbeat in the explosion.

"Repeated patterns are not uncommon for solar radio bursts," Kou said.


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