Superflarel is a very powerful explosion observed on stars outside the solar system. Such a flare, unlike the usual solar flare of our sun, is as much as ten thousand times stronger. But scientists have not ruled out the possibility of a superflare happening on the sun’s surface.
An international team of scientists has spotted superflares that have ten million times more energy than those that occur in the sun. Using the most advanced telescopes at the European Observatory in Chile (ESO), they studied stellar bodies called “extremely horizontally branched stars (EHB)”, located in the so-called “globular clusters”.
EHB stars have a mass equal to half the mass of our Sun but are four or five times warmer, and their maximum temperatures reach up to 19,400 degrees Celsius.
These small and hot stars are special because we know they are going through one of the last stages of their lives and will die prematurely, explains Yazan Momany, author of the study, and an astronomer from the INAF Observatory in Padua, Italy.
Scientists say EHB stars hold in their answer to the mystery of star evolution theory – why do stars like the sun lose 30 to 40 percent of their mass during their last evolutionary phases?
By studying them, astronomers have found that many of them regularly change their brightness, in periods that vary from a few days to a few weeks. After studying the data, they came to the conclusion that this was due to magnetic stains that cover their surface.
These spots cover up to a quarter of the star’s surface and differ from sunspots, for example, because they are much darker and colder and are significantly more stable than the sun.
Similarly, by observing the EHB stars, astronomers also observed two superflares, which were extremely powerful. Source