Conventional knowledge holds that most large galaxies harbor supermassive black holes at their centers. Scientists additionally believe that only so-called “active” galaxies ought to have visible accretion disc of matter, but the Hubble Space Telescope has found one around a black hole with unusually low luminosity. This galaxy may bend the rules a bit, but it presents a chance to check how the idea of relativity applies in the real world.
NGC 3147 is a large spiral galaxy just a bit smaller than our own Milky Way. It sits about 120 million mild-years away — you’ve probably seen photos of it because it’s fairly stunning. Active galaxies like quasars are easy to identify. The matter falling into them produces emissions throughout the electromagnetic spectrum, and the accretion discs are reasonably visible. Everybody thought NGC 3147 was far too dim to have a disc of its own, but a brand new evaluation from a global team suggests otherwise.
Hubble collected information from the central black hole in NGC 3147, which has a mass about 250 million occasions better than our solar. The thing seems to have a thin disc of material just like what you’d find around an active galactic nucleus. Observations from Hubble show the disc spins at about 10 percent the speed of light. Researcher Stefano Bianchi from the Università Degli Studi Roma Tre in Italy says this discovery indicates the current fashions for low luminosity galaxies have “clearly failed.”