银河系中心可能是暗物质而非黑洞

Core Viewpoint - The center of the Milky Way may not be a supermassive black hole but rather a dense structure of dark matter composed of fermions, which could explain both the high-speed orbits of stars and the large-scale rotation of material in the galaxy [2][3][4] Group 1 - An international team of astronomers challenges the traditional view of Sagittarius A* as a supermassive black hole, proposing instead a dark matter core that simulates black hole-like gravitational effects [2] - The research published in the Monthly Notices of the Royal Astronomical Society suggests that the dense core and the surrounding dark matter halo form a continuous structure, rather than being separate entities [3] - The model aligns with observations from the European Space Agency's Gaia mission, which shows a "Keplerian decline" in the motion of stars and gas away from the galaxy's center [3] Group 2 - The proposed dark matter model is the first to simultaneously explain both small-scale phenomena at the galaxy's center and the large-scale structure of the galaxy [3] - The model can also reproduce the "black hole shadow" observed by the Event Horizon Telescope, indicating that the dense dark matter core can bend light similarly to a black hole [3] - Future observations using the GRAVITY interferometer on the Very Large Telescope and the search for unique signals from black holes will be crucial for testing this new theory [3][4]