An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Ap star
  ستاره‌ی ِ Ap  
setâre-ye Ap
Fr.: étoile Ap  

A star 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.

See also: A for the spectral type, p for → peculiar; → star.