Astronomers at the European southern Observatory announced the discovery on the surface of hot stars in clusters of giant magnetic spots. In addition, they also noticed the giant flare, during which is several million times more energy than the same events in the Sun, according to the website of the Observatory.
In the study, researchers studied a special type of lights called stars, extreme horizontal branch. The mass of such stars is about four to five times less than that of the Sun, but they are hot.
It was unexpectedly found that the vast majority of stars are extreme horizontal branch observed in densely populated star groups, globular clusters, no stars-companions not noticeable. In addition, in the lengthy monitoring of these stars with the telescopes of ESO group found in these mysterious objects new feature. Watching three globular clusters, scientists have found many contained in them stars extreme horizontal branch regular changes in brightness with periods from just a few days to several weeks.
According to scientists, these stars were covered with magnetic spots. Spot on these hot and extreme stars brighter and hotter than the surrounding surface of the star, unlike the Sun, where the spots appear dark markings against the bright and hotter environment. In addition, the spots on the stars, extreme horizontal branch considerably more sun – they cover up to a quarter of the stellar surface. These spots are incredibly resilient – they keep for decades, and individual sunspots – short-lived education, they stay from several days to several months. When hot stars are rotating spots on the surface that appear in the field of view, then disappear from it, which leads to observed changes in gloss.
In addition, the researchers found several stars with sverhuspeshnaya that also indicate the presence of a magnetic field. According to the researchers, such outbreaks similar to those observed in the Sun, but millions of times more powerful.
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