人类首次“看见”的黑洞，“身份照”又上新！

Core Insights - The Event Horizon Telescope (EHT) collaboration released new images and research findings of the supermassive black hole at the center of the M87 galaxy, published in the journal Astronomy & Astrophysics [2] Group 1: Research Findings - The M87 black hole is located 55 million light-years from Earth and has a mass approximately 6.5 billion times that of the Sun, with the first image captured in 2017 and released in 2019 [2] - The latest image is based on observational data from 2017, 2018, and 2021, revealing the evolution of polarized radiation around the black hole over time and the first signs of extended radiation connecting the black hole's ring structure to the base of its jets [2][4] - Analysis of the three images indicates a change in the magnetic field distribution around the black hole, with a counterclockwise direction in 2017, consistent in 2018, and a clockwise reversal in 2021, suggesting ongoing evolution in the black hole's environment [4] Group 2: Implications for Astrophysics - The significant change in polarization direction may result from the interplay between internal magnetic structures and external effects, reflecting a turbulent environment around the black hole [4] - The powerful jets associated with M87 play a crucial role in galaxy evolution by regulating star formation and energy distribution on a large scale, producing electromagnetic radiation that aids in understanding extreme cosmic phenomena [4] Group 3: Technological Advancements - The EHT collaboration enhanced its observational capabilities in 2021 by adding two telescopes in Arizona and France, improving sensitivity and image clarity, along with upgrades to existing telescopes [5]