The sun lost their relatives in magnetic activity

369 after analyzing sun-like stars, astronomers came to the conclusion that the magnetic activity and variability of the brightness of the Sun is considerably less than that of similar bodies in the milky way. This raises the question of how to change his behavior over time. In an article published in the journal Science, scientists suggest that the Sun might experience a transition period.

The sun, like other similar stars, has a magnetic field that is generated due to the movement of a conducting plasma in the convection zone, or the Dynamo effect. Every 11 years the main component of the solar magnetic eld changes its direction, resulting in changes and activity that can be tracked by the number of dark spots on its surface during maximum activity the number sometimes reaches the hundreds, but “calm” spots almost absent. While the details of the mechanism that regulates magnetic activity, scientists are not clear, therefore, to predict how it will vary over time, the astronomers made similar to the Sun star.

Timo Reinhold (Timo Reinhold) from the max Planck Institute for Solar system research and colleagues reconstructed changes in the brightness of the Sun over the last 140 years based on available records about the dark spots on its surface and compared these data with changes in luminance 369 stars with similar mass, temperature, content of metals (elements heavier than hydrogen and helium) and the period of rotation. To do this, they analyzed the results of four years of observations of the space telescope “Kepler” and combined them with a catalog of the space telescope Gaia. In addition, astronomers have additionally included a sample of about 2500 stars, whose periods of rotation based on brightness variations could not be determined.

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