REVISITING THE “FLIP-FLOP” INSTABILITY OF HOYLE-LYTTLETON ACCRETION
REVISITING THE “FLIP-FLOP” INSTABILITY OF HOYLE-LYTTLETON ACCRETION
We revisit the flip-flop instability of two-dimensional planar accretion using high-fidelity numerical simulations. By starting from an initially steady-state axisymmetric solution, we are able to follow the growth of this overstability from small amplitudes. In the small-amplitude limit, before any transient accretion disk is formed, the oscillation period of the …