Sublimative rotational fission (SYORP) of planetesimals ≲0.1 km due to water ice outgassing produces debris outside white dwarf Roche radii on timescales of years to 10 yr for cooling ages up to 1 Gyr, much faster than YORP.
arXiv:2502.05502 Blackman J
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Producing planetary debris exterior to white dwarf Roche radii through sublimative rotational fission
Sublimative rotational fission (SYORP) of planetesimals ≲0.1 km due to water ice outgassing produces debris outside white dwarf Roche radii on timescales of years to 10 yr for cooling ages up to 1 Gyr, much faster than YORP.