Northwestern Detects 1-Parsec Wind From Sgr A*, Solving 50-Year Mystery
Updated
Updated · SciTechDaily · Jun 21
Northwestern Detects 1-Parsec Wind From Sgr A*, Solving 50-Year Mystery
1 articles · Updated · SciTechDaily · Jun 21
Summary
Five years of ALMA data revealed a subtle outflow from Sagittarius A*, the Milky Way’s central black hole, ending a decades-long hunt for the predicted wind.
A calibrated map 100 times deeper and 80 times sharper than earlier versions exposed a cone-shaped cavity nearly 1 parsec long and 45 degrees wide with no cold molecular gas.
Researchers said nearby stars could not supply enough energy to clear such a large region, pointing instead to a hot wind from the black hole that pushes away or heats the gas.
Chandra X-ray observations matched the gas-free cone, strengthening the case that the feature is real rather than an imaging artifact.
The team estimates the outflow has been active for at least 20,000 years, offering a rare view of a supermassive black hole in a relatively quiet state.
How will the cosmic wind from our galaxy's central black hole reshape the future of the Milky Way?
After a 50-year search, what other predicted cosmic secrets are we now equipped to finally uncover?
The Gentle Wind of Sagittarius A*: Breakthrough Observations Reveal Black Hole’s Subtle Influence on the Milky Way
Overview
A major breakthrough has revealed that Sagittarius A* (Sgr A*), the supermassive black hole at the center of our galaxy, does in fact produce a wind, ending decades of mystery about its quiet nature. This discovery not only aligns Sgr A* with other supermassive black holes that show similar outflows, but also provides the most detailed understanding yet of how it interacts with and transforms its environment. Scientists estimate this wind has been active for at least 20,000 years, offering a unique chance to study a black hole in its dominant, quiet phase and opening new avenues for exploring galactic center physics.