Two images of the supermassive black hole M87, one from 2017 observations, the other from 2018 observations
Two images of the supermassive black hole M87, one from 2017 observations, the other from 2018 observations The global Event Horizon Telescope (EHT) collaboration involving UCL researcher Dr Ziri Younsi has released new images of M87*, the supermassive black hole at the centre of the galaxy Messier 87. The new images are from observations taken in April 2018, one year after the first observations of M87* in April 2017 which resulted in the first ever image of a black hole. They reveal a familiar, bright ring of emission of the same size as was found in 2017. The brightness peak of the ring has shifted by about 30º compared to the images from 2017, which is consistent with theoretical understanding of variability from turbulent material around black holes. The EHT collaboration, involving more than 300 researchers, uses observations from a worldwide network of radio telescopes and the new images feature the first participation of the newly commissioned Greenland Telescope as well as a dramatically improved recording rate across the array of telescopes. The images are presented in a paper in the journal Astronomy & Astrophysics . Dr Keiichi Asada, of the Academia Sinica Institute for Astronomy and Astrophysics in Taiwan, said: " A fundamental requirement of science is to be able to reproduce results.
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