A new method of hunting nearby black holes turns up a monster

 

When many large stars die, they turn into black holes. And yet, despite the billions of stars in our Milky Way, astronomers have only discovered a handful of black holes within the galaxy. That's because, at the moment, their methods can only pick out black holes in certain situations.
The few nearby black holes discovered so far have been found because they're locked in a close orbit with a star. And astronomers find them by looking for X-ray radiation given off as the black hole pulls material from this companion sun.
Now, a group of Chinese astronomers think they’ve found a star-and-black-hole pair another way. Their method could help astronomers find many more black holes, especially ones in much wider orbits than the X-ray method can find.
And that's not the only surprise with the find. The new black hole they’ve found is more massive than they think it should be from the collapse of a single star in this system. And, so, astronomers aren’t sure how this odd black hole came to be in the first place.
The team describes their findings in a paper published Wednesday in Nature.

Read more:

https://astronomy.com/news/2019/11/a-new-method-of-hunting-nearby-black-holes-turns-up-a-monster?utm_source=asytwitter&utm_medium=social&utm_campaign=asytwitter