非常罕见！黑洞“干饭”现场，被中国卫星捕捉

Core Insights - The "Tian Guan" satellite may have captured a rare event of a medium-mass black hole tearing apart and consuming a white dwarf star, which, if confirmed, would be the first clear observation of such an extreme cosmic phenomenon, significantly enhancing the understanding of black hole activity and high-energy astrophysical mechanisms [1][3] Group 1 - The "Tian Guan" satellite's wide-field X-ray telescope, "Wan Xing Tong," discovered an exceptionally bright and rapidly changing X-ray source, designated EP250702a, on July 2, 2025, in the outskirts of a distant galaxy [1] - Observations indicated that X-ray radiation was present at the location approximately one day before a significant gamma-ray burst, suggesting that the physical engine of the explosion was activated much earlier than traditional gamma-ray bursts [1] - The characteristics of the event, including its high brightness and rapid evolution, could not be explained by common astrophysical explosion models, leading the scientific team to propose that a medium-mass black hole was involved in the disruption of a white dwarf star [1][3] Group 2 - The research team noted that the rapid decay and high brightness of the event imply that the consumed celestial body had a very high density, which aligns with the characteristics of a white dwarf star [3] - The estimated mass of the black hole involved is less than approximately 75,000 times that of the Sun, based on gamma-ray data from the Fermi satellite, and the event's location in the outskirts of the galaxy rules out the possibility of a supermassive black hole [3] - Only a medium-mass black hole would possess the capability to tear apart a dense body like a white dwarf, resulting in the observed brief, intense, and high-energy jets [3]