Ambipolar diffusion in protoplanetary discs triggers a resonant drag instability that destabilizes Alfvén waves via gas-dust relative drift, producing significant growth rates in dust-poor and tightly coupled regimes.
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Streaming instabilities in weakly ionized protoplanetary discs: the Ambipolar Streaming Instability (AmSI)
Ambipolar diffusion in protoplanetary discs triggers a resonant drag instability that destabilizes Alfvén waves via gas-dust relative drift, producing significant growth rates in dust-poor and tightly coupled regimes.