Silicon stars
A stars
Chemically peculiar stars
Holmium stars
Rapidly oscillating Ap star
Manganese stars
Peculiar A stars
Peculiar A-type stars
Ap-type stars
Stars of spectral type A in which lines of ionized metals and rare-earth elements are abnormally enhanced. Such stars have unusually strong magnetic fields, thousands of times stronger than the Sun's typical surface field. Ap stars are generally slow rotators because of magnetic braking.
Ap stars