【科技日报】双黑洞并合事件中发现第三致密天体存在迹象

Core Insights - A research team led by researcher Han Wenbiao from the Shanghai Astronomical Observatory has discovered that binary black holes may not be "lonely wanderers," but could be influenced by a third dense celestial body during merger events, providing new clues to the formation of binary black holes [1][2] Group 1: Research Findings - The research results were published on August 1 in the international journal "Astrophysical Journal Letters" [1] - Since the first detection of gravitational waves in 2015, over 100 gravitational wave events have been detected, most of which originate from binary black hole mergers, offering critical data for understanding the physical processes involved [1] - The research team previously proposed a model where a supermassive black hole and a binary black hole form a "trio," with the binary black hole being influenced by the supermassive black hole's gravity, leading to a gradual decrease in their orbital distance and the emission of gravitational waves [1] Group 2: Specific Event Analysis - The team focused on the gravitational wave event GW190814, which features two black holes with a mass difference of nearly 10 times, suggesting they may have once formed a "trio" with a supermassive black hole [2] - The presence of a third dense body near the binary black holes could create a line-of-sight acceleration, altering the frequency of gravitational waves through the Doppler effect, leaving a unique "signature" in the signals [2] - The analysis of multiple high signal-to-noise ratio binary black hole events strongly supports the existence of line-of-sight acceleration in the GW190814 event, marking the first clear indication of a third dense body in a binary black hole merger [2]