A famous galaxy's black hole has been hiding its most violent behavior

A famous galaxy's black hole has been hiding its most violent behavior. Researchers found that the black hole in NGC 1068 is blasting out a far more powerful and hidden gas outflow than previously realized. The study combined mid-infrared observations from the James Webb Space Telescope with optical data from the VLT/MUSE and millimeter-wave data from ALMA. The outflow, which is powered by the black hole, has two distinct components: one visible and a second, dust-shrouded component detected only in infrared light. The second component moves at a speed of 300 km/s and carries most of the outflow's mass. The outflow reached speeds of up to 2,000 km/s, meaning a substantial share of the black hole's violent, high-speed outflow has been hidden and undetected.

• The outflow's true mass, energy, and momentum were up to 100 times larger than previously thought.
• The outflow carries several million solar masses of ionized gas.
• The outflow's momentum was found to be larger than what AGN radiation alone is expected to produce.

The results suggest that mid-infrared observations, paired with advanced modeling, may be necessary to accurately measure how black holes reshape their host galaxies. The study highlights the limitations of standard methods and the drastic change of scenario that can emerge when properly evaluating the true outflow energetics. The findings illustrate the importance of using specialized tools to detect hidden outflows and understand their impact on galaxy evolution.

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