The first detection of what appears to be a rogue black hole drifting through the Milky Way, revealed earlier this year, just got important validation.
The first detection of what appears to be a rogue black hole drifting through the Milky Way,A second team of scientists, conducting a separate, independent analysis, has reached almost the same finding, adding weight to the idea that we've potentially identified a rogue black hole wandering the galaxy.Led by astronomers Casey Lam and Jessica Lu of the University of California, Berkeley, the new work has arrived at a slightly different conclusion, however.
Almost. What a black hole does have is an extreme gravitational field, so powerful that it warps any light that travels through it. For us, as observers, that means we might see a distant star appear brighter, and in a different position, than how it appears normally. "However, by also getting measurements of the apparent position of the background star, we can confirm whether the foreground lens really is a black hole."In this case, observations of the region were taken on eight separate occasions using the Hubble Space Telescope, up until 2017.
The resulting object is supported by something called neutron degeneracy pressure, whereby neutrons don't want to occupy the same space; this prevents it from completely collapsing into a black hole. Such an object has a mass limit of around 2.4 times the mass of the Sun. Sahu and his team found that the compact object is moving at a relatively high velocity of 45 kilometers per second, as the result of a natal kick: a lopsided supernova explosion can send the collapsed core speeding away.
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