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Not so dull

点击量:   时间:2019-03-06 10:08:05

THE failed stars known as brown dwarfs may have some life in them after all. A bright X-ray flare has been spotted on a nearby brown dwarf, much to the surprise of a team of astronomers led by Gibor Basri of the University of California, Berkeley. Basri says that other observations show that older brown dwarfs lose their hot atmosphere, or corona, so this can’t be the source of the flare. Instead, in a paper that will appear in Astrophysical Journal Letters,