3 ms·

The brightness comes from the accretion disk.

• pbhjpbhj 2y ago
  Yes, I understand that, but what is the failure mode - is it gradual or rapid? If it is rapid, then the system keeps shining even when it appears almost empty. If gradual, then I probably need to revisit what I learned of quasars done decades ago...
  • saagarjha 2y ago
    Let me know what you find ;)