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We analysed the vibrational stability of metal‐poor low‐mass main‐sequence stars due to the ɛ mechanism. Since outer convection zones of metal‐poor stars are limited only to the very outer layers, uncertainty in the treatment of convection does not affect the result significantly. We found that the dipole g 1  and g 2  modes definitely become unstable due to the ɛ mechanism for . Besides that, we found that as the metallicity decreases the mass range of ɛ‐mechanism instability extends toward higher mass.

Dipole low‐order g‐mode instability of metal‐poor low‐mass main‐sequence stars due to the mechanism