Black Hole Jets Measured at Half the Speed of Light

A team of astrophysicists, led by Curtin University, has successfully measured the power and speed of jets emanating from the Cygnus X-1 black hole system. By analyzing 18 years of high-resolution radio imaging data from the Very Long Baseline Array (VLBA) and the European VLBI Network (EVN), the team determined that the jets release energy equivalent to 10,000 Suns and travel at half the speed of light (150,000 km/s). This research confirms existing theories about how black holes shape the universe by depositing energy into surrounding space.

The study also revealed that approximately 10% of the matter falling into the black hole is ejected via these jets. This finding aligns with assumptions used in large-scale simulated models of the universe, which were previously difficult to confirm observationally. The ability to accurately measure jet power allows for better comparisons with X-ray emissions caused by infalling matter, improving our understanding of black hole physics across different scales.

These measurements provide a crucial anchor for understanding jets from black holes of varying masses, from 10 to 10 million times the mass of the Sun. The improved data will enable scientists to refine their models and simulations, leading to a more comprehensive understanding of black hole dynamics and their impact on the cosmos. This research highlights the importance of long-term, high-resolution observations in unraveling the mysteries of the universe.

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