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Study Reveals Unobserved Structures, Impact of Black Hole on its Surroundings


Study Reveals Unobserved Structures, Impact of Black Hole on its Surroundings
Written by AZoQuantumApr 15 2021
The first-ever image of a black hole the supermassive black hole found at the core of the M87 galaxy was captured by an international collaboration of researchers in 2019 by using a worldwide collection of radio telescopes known as the Event Horizon Telescope (EHT).
Image Credit: EHT Collaboration, NASA/Swift, NASA/Fermi, Caltech-NuSTAR, CXC, CfA-VERITAS, MAGIC, and HESS.
The M87 galaxy is located nearly 55 million light-years from Earth. This long-awaited breakthrough was a significant scientific landmark. But any image at a single wavelength can offer only a partial picture of the whole phenomenon. ....

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VLA Helps Astronomers Make New Discoveries About Star-Shredding Events - National Radio Astronomy Observatory


VLA Helps Astronomers Make New Discoveries About Star-Shredding Events
Credit: Sophia Dagnello, NRAO/AUI/NSF
Black holes that are millions or billions of times more massive than the Sun lurk at the cores of large galaxies and can have profound effects on their surroundings. One of the more exciting of those effects comes when a star ventures too close to the black hole and falls victim to that monster’s powerful gravitational pull. The star is shredded by tidal forces in a process colorfully termed
spaghettification.
When that happens, some of the star’s material is pulled into a disk that orbits the black hole, heating rapidly and launching jets of fast-moving particles outward in two opposite directions. This produces an outburst that can be observed with a variety of telescopes, including radio, visible, ultraviolet, and X-ray instruments. ....

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