Overview
- A peer-reviewed study published Thursday reports a nearly three–light-year cone-shaped cavity next to Sagittarius A* that lacks cold carbon monoxide and matches a Chandra X-ray feature, which the authors interpret as a hot wind clearing molecular gas.
- The result rests on more than 100 hours of ALMA observations collected over five years and a new data-processing pipeline that revealed structures about 100 times fainter and roughly 80 times sharper than prior images.
- Researchers say the geometry and X-ray match point to a mild, wide-angle wind rather than a narrow relativistic jet, a form of outflow that can heat or push away cold gas and thus alter star formation near the galactic center.
- Other astronomers urge caution and call for velocity-resolved spectroscopy and repeated imaging to detect gas motion or evolving cavity edges, tests that would distinguish an active outflow from alternative explanations.
- The finding links to earlier evidence for stronger, episodic eruptions from Sgr A* on larger scales and, if confirmed, would show that low-level, persistent winds are another channel by which even quiet supermassive black holes influence galaxy evolution.