An Etymological Dictionary of Astronomy and Astrophysics
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In models of magnetized → accretion disks, the process whereby the disk is disrupted at a radius where the → magnetic pressure overcomes the → ram pressure of the accreted material. This occurs at a distance typically 3-7 stellar radii, below the → corotation radius.

→ disk; → truncation.

The act or process of truncating, as → disk truncation.

Verbal noun from → truncate.