12/19/2023 0 Comments Gargantua black holePrashant Kocherlakota and Professor Luciano Rezzolla from the Institute for Theoretical Physics at Goethe University Frankfurt, have now investigated for the first time how the different theories fit with the observational data of the black hole M87* at the center of the galaxy Messier 87. String-inspired theories of black holes predict the existence of an additional field in the description of fundamental physics, which leads to observable modifications in the sizes of black holes as well as in the curvature in their vicinity. In addition to black holes predicted from Einstein’s theory of general relativity, one can consider those from models inspired by string theories, which describe matter and all particles as modes of tiny vibrating strings. Credit: Prashant Kocherlakota, Luciano Rezzolla (Goethe University Frankfurt and EHT Collaboration/ Fiks Film 2021) The “edge” of a black hole is known as the event horizon, the boundary around the concentration of mass beyond which light and matter cannot escape and which makes the black hole “black.” Black holes, theory predicts, can be described by a handful of properties: mass, spin, and a variety of possible charges.Īll of these black holes cast dark shadows that are distinguishable from each other in size, but only those that fall in the gray band are compatible with the 2017 EHT measurements of M87*, and in this image, the one represented in red at the bottom is too small to be a viable model for M87*. New Zealand physicist Roy Kerr showed rotation can change the black hole’s size and the geometry of its surroundings. In 2019, the EHT collaboration published the first image of a black hole located at the center of the galaxy M87.Īs first pointed out by the German astronomer Karl Schwarzschild, black holes bend space-time to an extreme degree due to their extraordinary concentration of mass, and heat up the matter in their vicinity so that it begins to glow. According to the tests, the size of the shadow from M87* is in excellent agreement being from a black hole in general relativity, but sets constraints on the properties of black holes in other theories. Theoretical physicists at Goethe University Frankfurt have analyzed data from the black hole M87* as part of the Event Horizon Telescope (EHT) collaboration to test Albert Einstein’s theory of general relativity. ![]() Scientists at Goethe University Frankfurt and the Event Horizon Telescope Collaboration use data that produced the first image of a black hole to constrain its fundamental properties. The black hole is labeled, showing the anatomy of this fascinating object. This thin disc of rotating material consists of the leftovers of a Sun-like star which was ripped apart by the tidal forces of the black hole. ![]() This artist’s impression depicts a rapidly spinning supermassive black hole surrounded by an accretion disc.
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