What material did the Spitzer Space Telescope find concentrated near the galactic center of M31 that likely serves as fuel?

Answer

Cold dust and gas

Astronomers using the Spitzer Space Telescope found a considerable reservoir of cold dust and gas concentrated near the galactic center, identified as potential fuel for episodic feeding events.

What material did the Spitzer Space Telescope find concentrated near the galactic center of M31 that likely serves as fuel?
SpaceAndromedagalaxyblack hole