And there's another distinction, small black holes give off high-energy X-rays, while the larger black holes tend to give off low-energy x-rays. Because this one is so bright, researchers assumed it was a massive black hole with low energy x-rays. (Via YouTube / Vsauce)
But for some reason, it gives only incredibly low energy X-rays but has the brightness of small black hole. Confused? So were the scientists that discovered it.
As one of the researchers told Space.com: "As if black holes weren't extreme enough, this is a really extreme one that is shining as brightly as it possibly can … It's figured out a way to be more luminous than we thought possible."
They eventually figured out the black hole was in fact a small one but it has a companion star that orbits around it — also known as a Wolf-Rayet system. (Via YouTube / Sky Faction)
With that, they were able to estimate the black hole's mass was between 20-30 times that of the sun. (Via YouTube / maverick)
As for what's making it so bright, a writer at the Los Angeles Times explains one possibility: " The astronomers think that the black hole has a companion star whose stellar wind – gusts of charged particles blowing out from the star's body and onto the black hole's accretion disk – could be powering the bright beacon."
The researchers say the discovery should force them to rethink the way black holes radiate energy. Their findings are published in the journal Nature.
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