astrophysics, chemically peculiar stars (CP stars) are stars with distinctly unusual metal abundances, at least in their surface layers. Chemically peculiar stars...

(abbreviated 20 Tau), is a star in the constellation of Taurus. It is a blue giant of spectral type B8 III, a chemically peculiar star, and the prototype of...

An Am star or metallic-line star is a type of chemically peculiar star of spectral type A whose spectrum has strong and often variable absorption lines...

A mercury-manganese star (also HgMn star) is a type of chemically peculiar star with a prominent spectral line at 398.4 nm, due to absorption from ionized...

later revised to A1 IV. It is considered to be a mild Am star, a type of chemically peculiar star with unusually strong lines of certain metallic elements...

the star rotates. Its brightness varies by 0.04 magnitudes with a period of 2.61 days. It is also an Ap star, a type of chemically peculiar star with...

rarely used. It is a chemically peculiar B7 giant star, 134 light years away from the Sun with an apparent magnitude of 1.65. This star has two Bayer designations:...

through other means. S-type star, similar, but not as extreme Technetium star, another type of chemically peculiar star Marc Aaronson, American astronomer...

A Lambda Boötis star is a type of chemically peculiar star which has an unusually low abundance of iron peak elements in its surface layers. One possible...

701. Sokolov, N. A. (March 2008), "Radial velocity study of the chemically peculiar star ɛ Ursae Majoris", Monthly Notices of the Royal Astronomical Society:...

metal-poor stars, usually referred to as CEMP stars, are a class of chemically peculiar star. CEMP stars have [C/Fe] > +1, which means compared to the Sun these...

a chemically peculiar star, HR 7775, having extraordinary enhancements of the element gold in its atmosphere. A twenty-year study of the B6III star 3...

brightest star is of mag 7.6. Its age has been estimated at 660 million years. The cluster contains at least one chemically peculiar star - NGC 6633...

abundances of certain metals. A catalogue of chemically peculiar stars gives the type F3 Ho, indicating an Ap star with an approximate spectral class of F3...

constellation Cassiopeia, about 2,800 light years away. It is a chemically peculiar Am star. 2 Cassiopeiae has been described as an A4 type bright giant...

Robert Davis reported that the star has an overabundance of silicon. It is classified as a chemically peculiar star. Henning Jorgensen et al. reported...

α Doradus A, is a chemically peculiar star whose atmosphere displays an abnormally high abundance of silicon, making this an Si star. Alpha Doradus has...

orbital motion can be observed. 𝜈1 Draconis is an Am star, a slowly rotating chemically peculiar star with abnormally strong metallic absorption lines in...

detection of a magnetic field on a spectral class A star that is not an Ap chemically peculiar star. The average line of sight component of this field...

type of chemically peculiar star with an over-abundance of certain metals in its spectrum. HD 222925 has been referred to as the 'gold standard star' by the...

all naturally occurring chemical elements heavier than lithium. Stellar mass loss or supernova explosions return chemically enriched material to the...

B0–B3 exhibit unusually strong lines of non-ionized helium. These chemically peculiar stars are termed helium-strong stars. These often have strong magnetic...

Ap and Bp stars are chemically peculiar stars (hence the "p") of spectral types A and B which show overabundances of some metals, such as strontium, chromium...

from the star's center, and there are helium spots on the surface near the magnetic poles. V2052 Ophiuchi is a type of chemically peculiar star known as...

magnitude. It is a magnetic chemically-peculiar star with an average quadratic field strength of (−206±68)×10−4 T. The star is around 178 million years...

; Malaroda, S. (2000). "A spectroscopic study of the magnetic chemically peculiar star nu Fornacis". Astronomy and Astrophysics. 359: 635–638. Bibcode:2000A&A...

satellite data, and it received its variable star designation in 1999. This is a magnetic chemically peculiar star that has been assigned stellar classifications...

identified as part of the group of mercury-manganese stars, a class of chemically peculiar stars which have an excess of elements such as mercury, manganese...

magnitudes over a period of approximately 1.5 days. Chi Serpentis is a chemically peculiar star. The two stars in Serpens Caput that form part of the Snake's body...

and a period of one week. The primary component is a chemically peculiar star of type CP1, or Am star, with a stellar classification of A8m. Abt and Morrell...