SUMMARYIndependent researchers reanalyzed the original Event Horizon Telescope data behind the first black hole image, published on April 10, 2019, and confirmed the ring structure seen around the supermassive black hole in galaxy M87. Their work, published in Nature, found the original image’s diameter and orientation were consistent while offering a fresh look at finer details. The team also developed a traditional statistical imaging method that produced the same overall result and could be adapted for medical imaging or earthquake mapping.
An anonymous reader quotes a report from The Conversation: On April 10 2019, the Event Horizon Telescope (EHT) Collaboration revealed the first picture of a black hole. The object is at the centre of a galaxy known as M87, about 55 million light-years away. The iconic ring structure instantly became one of the most recognized scientific images of the modern era. It showed a black hole "shadow" outlined by light from swirling hot gas -- just as predicted by Einstein's theory of general relativity. The result supported the long-standing idea that the centers of galaxies house supermassive black holes. However, scientists have since had some disagreements on whether the details and structure of the ring in the original publication were accurate. Our new research, published today in Nature, used new techniques to investigate the original datasets. Not only do our results validate the original work, but they also provide a fresh perspective on the ring structure. Our independent results enhance confidence in one of the most significant modern scientific results. And we bring the image of a black hole millions of light-years away back into focus.
[...] When compared directly to images from the EHT collaboration, our result is consistent in diameter and overall orientation. Naturally, there are some differences in the fine details of ring width and surface brightness along the circumference, but the overall structure matches. This provides a fresh perspective on the iconic black hole ring while also resolving previous discrepancies. To prove this success didn't depend solely on advanced machine learning, we also developed a complementary imaging method based on traditional statistical techniques. This entirely different method also validated our structure using the new closure invariant data we produced. Overall, our work delivers a strong independent validation of the supermassive black hole structure at the centre of galaxy M87. And it could do more in the future. Our technique could also be useful in other situations where data from multiple sensors are combined to map unknown structures -- such as medical imaging or mapping earthquakes.