cs_

plasmapy.formulary.speeds.cs_(T_e: Unit('K'), T_i: Unit('K'), ion: str | Integral | Particle | CustomParticle | Quantity, n_e: Unit('1 / m3') = None, k: Unit('1 / m') = None, gamma_e=1, gamma_i=3, Z=None)

Alias to ion_sound_speed.