Eccentric millisecond pulsars by resonant convection

Eccentric millisecond pulsars (eMSPs) with white dwarf companions exhibit orbital eccentricities orders of magnitude larger than predicted by turbulent convection in the dwarfs' red giant progenitors. The periods eMSPs cluster around $P=20-30$ d, remarkably close to convective eddy turnover time $t_{\rm eddy}$. We propose that anomalously large are resonantly driven flows somehow made coherent when matches tidally locked giant's spin period, which is also tidal forcing period. Numerical simulations rotating giants and magnetic field studies stars show some evidence for especially ordered flow patterns Rossby number $P/t_{\rm eddy}$ order unity. resonant boosts a factor $(t_{\rm nuc}/P)^{1/2}\approx 3\times 10^3$ over random-walk values characterize conventional MSPs, good agreement observations ($t_{\rm nuc}$ nuclear burning time-scale). how variations arising from metallicity can reproduce observed effective width resonance, $\Delta P/P\approx 0.4$.