SMBH X-ray QPO Animation
https://scitechdaily.com/first-confir...
Model for the Quasi-Periodic Oscillations (QPO) — or 'heartbeat' — where the inner part of the accretion disc is oscillating in size and shape, shown as a cross-section in the plane of the disc.
Credit: Dr. Chichuan Jin of the National Astronomical Observatories, Chinese Academy of Sciences