AI Insight
Black hole jets from supermassive black holes at galaxy centers extend far into the circumgalactic medium (CGM), a vast envelope of gas that surrounds galaxies and stretches 10-20 times beyond their visible edges. These powerful jets can influence the fate of their host galaxies by affecting the reservoir of cold, dense gas from which new stars form. The research highlights how activity from central black holes impacts galactic evolution on scales much larger than previously understood.
Why it matters
This finding helps explain how galaxies regulate their star formation over cosmic time scales. Understanding the interaction between black hole jets and the circumgalactic medium could resolve longstanding questions about why some galaxies stop forming stars while others remain active.
Understand the Science
Galaxies are enormous and hold hundreds of billions of stars. These stars form from cold, dense gas. Every large galaxy, including the Milky Way, is wrapped in a huge envelope of gas called the circumgalactic medium, or CGM. This reservoir of raw material stretches 10–20 times the size of the visible portion of the galaxy.
Source: Black hole jets reach far beyond galaxies' visible edges, potentially deciding their fate