How does an accretion disk form?
An accretion disk forms when gas and dust flatten into rotation around a central object because of angular momentum.
Formation, motion and physical explanation
Turbulence and magnetic stresses move angular momentum outward while matter drifts inward. Gravitational energy heats the disk and produces multiwavelength radiation.
Evidence, applications and limits
Young-star disks can form planets, while compact binaries can emit X-rays. Brightness depends on mass flow, jets, winds and viewing angle. Conclusions about distant objects rely on testing images, spectra, time variation and physical models together.
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