The rotation speed of some of the aging stars turned out to be unusually high

In the new work, the researchers studied the processes that occur with aging stars.To do this, the

Scientists at the university used asteroseismology to calculate how the star rotates. 

The authors measured the modes or frequencies of sound waves,produced by the vibrations of the star. Their age, according to astronomers, ranged from 1 billion to 13 billion years. When the star rotates, these waves split into different frequencies. By measuring these frequencies, it is possible to calculate the rotation rate for both young and old stars.

When astronomers compared the speeds calculatedbased on starquakes and spots, they found that for relatively young stars these values ​​coincided, while for aging stars they diverged significantly.

Although we've suspected for some time that old stars are spinning faster than predictedAccording to the theory of magnetic braking, these new asteroseismic data are the most convincing of all.Models based on observations of young stars suggest that the change in a star's rotation is constant throughout their lifetime, which is different fromof what we see in this new data. 

Oliver Hall, Lead Author of the article, Dr.

Such a discrepancy between theory and practice, according to scientists, can be explained by the fact that the effect of the magnetic field on the rotation of the star gradually weakens as the star ages.The authors attribute this to age-related changes in the nature of the motion of matter inside stars.

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