Mysteries of Cosmic Jets Revealed by NASA's X-ray Telescope

In a surprising discovery, astronomers found that the bright "blobs" within a jet from a nearby black hole seem to speed up when viewed in X-rays compared to radio waves. This intriguing find comes from studying data collected over decades by NASA's Chandra X-ray Observatory. The lead researcher, David Bogensberger from the University of Michigan, said this is like seeing a unique picture that you can't get with any other type of light. This study is part of a bigger effort to figure out how these jets work, especially in X-ray light, where much is still unknown. The black hole they studied is at the heart of the Centaurus A galaxy, about 12 million light-years away. One of its jets points toward Earth, while the other faces away.

Scientists know jets are powered by stuff that gets swept up by black holes, but they're not sure exactly how material gets channeled into the jets. Some think it might be due to messy magnetic fields around the black hole or the black hole's spin itself. Another mystery is why the brightness of these blobs changes over time. Some blobs get brighter while others fade, something seen before in a different galaxy. Future research might help understand if this behavior is part of how jets work naturally or if it's caused by something in their environment, like interstellar material. The study was published in The Astrophysical Journal.

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