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Sun-like star decline in activity over time


Scientists studied data from European Space Agency’s XMM-Newton and NASA’s Chandra X-ray Observatory and studied 24 stars with masses likely to the sun, ages of about a billion years.

A new study reveals that a turbulent youth caused the sun-like stars to calm down unusually. The study aimed at analyzing how the brightness of stars looking like the sun behaves with time.
The scientists studied 24 stars with masses like the sun, and ages of a billion years or more. The research published in the Monthly Notices of the Royal Astronomical Society showed that stars drop in activities with time.

The quick reduction in X-ray brightness means a rapid drop in energetic activity, which may create a good environment of the making and evolution of life on any rotating planet. The lead author from Queen’s University in Belfast, Rachel Booth said the findings are good information about the future habitability of orbiting planets because there would be less harmful X-ray and UV rays hitting the worlds than we used to believe.

High levels of magnetic activity and its effects

The X-ray emission from a galaxy comes from a thin, outer layer with high temperature known as the Corona. Astronomers have found the corona is heated following the turbulent activities of the outer layers and the magnetic fields of a star. As such, there could be high UV light and X-rays and stellar flares because of elevated levels of magnetic activity.

Intense magnetic activity can also cause high eruptions of materials from the surface of the star. Such eruptions and energetic radiation can have effects on planets, damaging their atmospheres. X-ray observations can give astronomers deep insight about the energy of the surrounding star environment, and this has been since X-ray mirror magnetic activity. The recent study made it clear that older stars drop in activity way more than younger stars.

Astronomers need more accurate ages of various stars to study and understand how fast stellar magnetic activity changes with time. It may not come easily, but recent specific age estimates have been made possible from the studies of the pulsating ability of stars, as studied by ESA’s CoRoT and NASA missions.