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The Milky Way’s black hole is eerily quiet. Scientists have now found evidence of missing wind
After five years of observations, researchers found a 3-light-year cavity that suggests Sagittarius A* is pushing out a weak wind.
- University of Michigan doctoral student Xin "Cindy" Xiang used XRISM data to reveal that black hole winds in galaxy NGC 4151 can sweep away gas, potentially reducing future star formation in massive galaxies.
- Analyzing NGC 4151, researchers identified a direct timing connection where powerful outflows typically appear about 10,000 seconds after X-ray activity, providing insight into how black holes influence galactic evolution.
- After analyzing five years of radio data, Northwestern University research assistant professor Mark Gorski and assistant professor Lena Murchikova found evidence of a "missing" wind from Sagittarius A* using the Atacama Large Millimeter Submillimeter Array.
- Observations revealed a cone-shaped cavity about 3 light-years long in cold gas, confirming that hot plasma from the black hole sculpted the region and supports the theory that these winds regulate star formation.
- These findings demonstrate that even when not undergoing rapid growth, supermassive black holes launch winds into host galaxies, offering astronomers a new tool to understand why massive galaxies contain fewer stars than expected.
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22 Articles
The Milky Way’s black hole is eerily quiet. Scientists have now found evidence of missing wind
Scientists say they have detected evidence of cosmic-scale wind coming from a supermassive black hole at the center of our galaxy, potentially solving one of the longest-standing mysteries in astronomy.
·Boston, United States
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Black hole winds may be robbing giant galaxies of their future stars
Astronomers may be closing in on a long-standing cosmic mystery: why some of the universe’s biggest galaxies seem to have far fewer stars than expected. Using NASA- and JAXA-supported XRISM observations of a galaxy called NGC 4151, researchers found strong evidence that supermassive black holes can unleash powerful winds that blow away the raw material needed to make new stars.
·United States
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