Overview
- Researchers published a paper Thursday, June 4, 2026, reporting that five years of ALMA radio data processed with a new calibration and matched to Chandra X‑ray maps reveal the signal.
- The team found a cone-shaped cavity within roughly three light‑years of Sagittarius A* that is empty of cold molecular gas and filled with hot X‑ray emission, which they interpret as a wind sweeping or heating the gas.
- The authors estimate the flow has pushed into local ionized gas for about 20,000 years and calculated that nearby stellar winds cannot supply enough energy to make the cavity, pointing to the black hole as the source.
- They describe the outflow as a relatively weak, long‑lived ‘‘breeze’’ consistent with Sgr A*’s quiet state, but say direct kinematic measurements of gas velocity are still needed to confirm the motion and full extent.
- If confirmed, the finding would show that even underfed supermassive black holes drive steady feedback that can shape gas supply and influence star formation, and it will prompt targeted velocity and time‑monitoring follow‑up.