Scientists at the University of Birmingham in the UK found that the speed of rotation of aging stars was unusually high.
In the new work, the researchers studied the processes that occur with aging stars. To do this, a team of university scientists used astroseismology to calculate how the star rotates.
The authors measured the modes or frequencies of the 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 velocities calculated from starquakes and spots, they found that for relatively young stars, these values coincided, while foraging stars, they differed significantly.
While we have suspected for some time that old stars rotate faster than magnetic braking theories predict, this new astroseismic data is the most compelling of all. Models based on observations of young stars suggest that the change in the star’s rotation is constant throughout their life, which is different from 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 is gradually weakening as the star ages. The authors attribute this to age-related changes in the nature of the movement of matter inside the stars.