JWST Observations Reveal Metal Enrichment in Gas Near Sagittarius A*

• Researchers using JWST data have determined that gas near the Milky Way's supermassive black hole, Sagittarius A* (Sgr A*), is enriched with astronomical metals, reaching approximately 1.8 times solar abundance.
• The study, led by PhD student Nicole Ford of McGill University, was published in The Astronomical Journal.

The Galactic Center Minispiral

• The research focused on the 'Minispiral,' a structure inside the circumnuclear disk (CND) composed of the Northern Arm, Eastern Arm, and Western Arc.
• These filaments act as conduits, connecting cold molecular gas to the hotter plasma of the Nuclear Star Cluster.

Impact of Supernovae on Sgr A*

• The enrichment is attributed to past supernovae, specifically the remnant Sgr A East, which overlaps with the region.
• Sgr A East has injected significant energy into the area, keeping the environment hot and turbulent.
• Because gas must be cool and compressed to flow into the black hole, the heat and turbulence created by these past explosions help explain why Sgr A* consumes matter at a significantly slower trickle compared to other active supermassive black holes.