"stars: chemically peculiar"

HD 185330 — chemically peculiar $^3$He star in the Kepler field

A non-LTE spectral analysis of the $^3$He and $^4$He isotopes in the HgMn star kappa Cancri

Doppler imaging of the helium-variable star a Centauri

Emission lines in the optical spectrum of 3 Cen A