NASAのインスタグラム(nasa) - 10月20日 13時22分

Mysterious cosmic objects that dramatically burst in X-rays may represent a new class of explosive events found in space. The objects flare up and becomes about a hundred times brighter in less than a minute, before returning to original X-ray levels after about an hour. At their peak, these objects qualify as ultraluminous X-ray sources that give off hundreds to thousands of times more X-rays than typical binary systems where a star is orbiting a black hole or neutron star. "We've never seen anything like this," said Jimmy Irwin of the University of Alabama, who led the study that appears in the latest issue of the journal Nature. "Astronomers have seen many different objects that flare up, but these may be examples of an entirely new phenomenon." This image shows the galaxy NGC 5128 that has the remarkable source that dramatically flares in X-rays unlike any ever seen.

Credits: NASA/CXC/UA/J.Irwin et al.

#nasa #space #astronomy #chandra #xray #galaxy #cosmic #blackhole #science

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