In astrophysics, chemically peculiar stars (CP stars) are stars with distinct patterns of metal and helium abundances, at least in their surface layers.
Classification
Chemically peculiar stars are common among hot main-sequence (hydrogen-burning) stars. These hot peculiar stars have been divided into four main classes on the basis of their spectra, although two classification systems are sometimes used: Similarly, the binary star HIP 79098, whose primary is a mercury-manganese star, was found via direct imaging to have either a circumbinary brown dwarf or a circumbinary gas giant.
See also
- List of stars that have unusual dimming periods
- Przybylski's Star