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Stars with distinctly unusual metal abundances
chemically peculiar stars (CP stars) are stars with distinct patterns of metal and helium abundances, at least in their surface layers. Chemically peculiar
Chemically_peculiar_star
Chemically peculiar stars of spectral types A and B
Magnetic chemically peculiar stars, also known as Ap and Bp stars, are chemically peculiar stars (hence the "p") of spectral types A and B which show
Magnetic chemically peculiar star
Magnetic_chemically_peculiar_star
Topics referred to by the same term
in which it is situated Chemically peculiar star, a star that has a distinct pattern of chemicals. Peculiar, Missouri Peculiar Township, Cass County, Missouri
Peculiar
Type of chemically peculiar star
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
Am_star
Star in the Taurus constellation
is a star in the constellation of Taurus. It is a blue giant of spectral type B8 III, a chemically peculiar star. Maia is the fourth-brightest star in the
Maia_(star)
Star in the constellation Centaurus
Sun in the southern constellation of Centaurus. It is an unusual chemically peculiar star with a unique spectrum showing over-abundances of most rare-earth
Przybylski's_Star
Type of star with a prominent spectral line due to absorption from ionized mercury
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
Mercury–manganese_star
Peculiar star with unusually low amount of iron
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
Lambda_Boötis_star
Chemically peculiar star
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
HD_222925
Chemically peculiar stars
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
CEMP_star
Star in the constellation Ursa Major
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
Merak_(star)
Star in the constellation Hercules
component A, is a magnetic chemically peculiar star with a stellar classification of A1VpSiSrCr, appearing as an A-type main-sequence star with abnormal abundances
52_Herculis
Brightest star in the constellation Lyra
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
Vega
Star in the constellation Cassiopeia
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
2_Cassiopeiae
Star whose atmosphere contains more carbon than oxygen
through other means. S-type star, similar, but not as extreme Technetium star, another type of chemically peculiar star Marc Aaronson, American astronomer
Carbon_star
Star in the constellation Dorado
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
Alpha_Doradus
Star in the constellation Virgo
This is an A-type main-sequence star with a stellar classification of A0 V, and is a suspected chemically peculiar star. However, Abt and Morrell (1995)
109_Virginis
Double star in the constellation Boötes
although it is considered doubtful that HD 127304 is actually a chemically peculiar star. HD 127304 has a faint magnitude 10.62 companion at an angular
HD_127304
Star in the constellation Aquarius
is a non-magnetic chemically peculiar star with a stellar classification of B8 IIIp Mn:Hg:. It is a candidate mercury-manganese star, showing a surfeit
Rho_Aquarii
Binary star in the constellation Auriga
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
HD_30453
Star in the constellation Cygnus
is a chemically peculiar star of spectral type B, located in the constellation Cygnus, at a distance of 430 parsecs (1,400 ly) from Earth. The star belongs
HD_188101
Star in the constellation Aries
the star, then called HR 830, is a variable star. It was given its variable star designation, VZ Arietis, in 1987. This is a chemically peculiar star of
VZ_Arietis
Star in the constellation Aquarius
suspected chemically peculiar star star with a stellar classification of B9 III, although Adelman et al. (2004) consider it to be a normal star with near-solar
5_Aquarii
Alfvén speed equals the large-scale stellar wind speed. Am star A chemically peculiar star belonging to the more general class of A-type stars. The spectrum
Glossary_of_astronomy
Binary star in the constellation Crater
98088 is a close binary star system of chemically peculiar stars in the southern constellation of Crater. It has the variable star designation SV Crt and
HD_98088
Star in the constellation Ursa Major
701. Sokolov, N. A. (March 2008). "Radial velocity study of the chemically peculiar star ɛ Ursae Majoris". Monthly Notices of the Royal Astronomical Society:
Alioth
Star in the constellation Andromeda
satellite data, and it received its variable star designation in 1999. This is a magnetic chemically peculiar star that has been assigned stellar classifications
13_Andromedae
Star in the constellation Taurus
6 Tauri, also designated t Tauri, is a chemically peculiar star in the northern constellation of Taurus. It has an apparent visual magnitude of 5.8, so
6_Tauri
Star in the constellation Centaurus
main sequence star with a stellar classification of B3 V. It is a helium-rich star, the most massive type of chemically peculiar star. Sigma Centauri
Sigma_Centauri
Star in the constellation Microscopium
based on parallax. It is an Ap star, a chemically peculiar star with unusually strong metallic spectral lines. The main star is known to be a binary, with
Theta2_Microscopii
Star in the constellation Columba
magnitude of +1.55. This is an Am star with a stellar classification of A2mA5-A9, which means it is a chemically peculiar star that displays strong absorption
Pi1_Columbae
Star in the constellation Circinus
("nebulous") absorption lines due to rotation and the 'p' meaning a chemically peculiar star. The two components appear to have similar visual magnitude, mass
Theta_Circini
Stellar classification distinguished by bright blue luminosity
B0–B3 exhibit unusually strong lines of non-ionized helium. These chemically peculiar stars are termed helium-strong stars. These often have strong magnetic
B-type_main-sequence_star
Open cluster in the constellation of Ophiuchus
brightest star is of mag 7.6. Its age has been estimated at 550 million years. The cluster contains at least one chemically peculiar star - NGC 6633
NGC_6633
Star in the constellation Delphinus
A3 IVs, which matches an A-type subgiant star with narrow absorption lines. It is a suspected chemically peculiar star that is about 64.3%±9.2% of the way
Eta_Delphini
Star in the constellation Auriga
velocity of −8 km/s. The star is a member of the Ursa Major stream of co-moving stars. The visible component is a chemically peculiar star with a stellar classification
Omicron_Aurigae
Star in the constellation Cancer
is also an A-type main sequence star, of spectral type A3V. A 1995 study found this to be a chemically peculiar star with a class of A2 Vp(4481 wk). In
Phi2_Cancri
Star in the constellation Aquila
the spectrum displays elements of both a giant star and a bright giant. It is a chemically peculiar star of the Mercury-Manganese type (CP3), although
21_Aquilae
Star in the constellation Serpens
magnitude of approximately 5.804. It is a well-known Am star, a type of chemically peculiar star with unusually strong lines of heavier elements (metals)
Tau7_Serpentis
Star in the constellation Aries
further away with a radial velocity of +18 km/s. This is a magnetic, chemically peculiar star of the silicon type with a stellar classification of B9pSi, and
56_Arietis
Star in the constellation Camelopardalis
component is a weakly magnetic chemically peculiar star with a stellar classification of B9.5VpSi, matching a B-type main-sequence star with an anomalous abundance
BN_Camelopardalis
Star in the constellation Ara
HD 153201 is a Bp star in the southern constellation of Ara. It is chemically peculiar star that displays an anomalous abundance of the element silicon
HD_153201
Variable star in the constellation Orion
wind. The rotational braking in this star is 0.54±0.02 s per year, a record level for magnetic chemically-peculiar stars. Surprisingly, a long-term study
V901_Orionis
Star in the constellation Aquila
B-type giant star. It is a chemically peculiar star of a weak mercury-manganese type (CP3), and is the most chromium–deficient star known. The star may possess
46_Aquilae
Star in the constellation of Scorpius
main-sequence star with a spectral type of B6Vp and a mass estimated at 3.7 times the solar mass. HIP 77900 is a helium-weak chemically peculiar star, and has
HD_142250
Magnetic field generated inside a star
stellar magnetic field Intermediate polar Magnetic field Chemically peculiar star Polar (star) SX Arietis variable Vaughan–Preston gap Brainerd, Jerome
Stellar_magnetic_field
Star in the constellation Microscopium
as well as an Ap star, a chemically peculiar star with strong metallic lines in its spectrum. It is an A-type main-sequence star with a stellar classification
Theta1_Microscopii
Star in the constellation Aries
parallax. This object is classified as an Am star, or non-magnetic chemically peculiar star of the CP1 class, which means the spectrum displays abnormal abundances
49_Arietis
Star in the constellation Aquila
it the yellow-white hued glow of an F-type star. It is a type of chemically peculiar star known as an Ap star, as indicated by the 'p' in the stellar classification
10_Aquilae
Binary star in the constellation of Andromeda
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
Alpheratz
Star in the constellation Auriga
) for this star, suggesting it is an evolved B-type star and a suspected chemically peculiar star of the mercury-manganese type. It is estimated to be
HD_37519
Small number of stars that orbit each other
single star. A large group of stars bound by gravitation is generally called a star cluster or galaxy, although, broadly speaking, they are also star systems
Star_system
Star in the constellation Hercules
be an evolved B-type giant star with a stellar classification of B9 III. It is a mercury-manganese chemically peculiar star, indicating the spectrum shows
Upsilon_Herculis
Star in the constellation Triangulum
been classified as having a peculiar spectrum, but it is considered doubtful that it is actually a chemically peculiar star. It was once designated Eta
7_Trianguli
Star in the constellation Aquila
A3 V. It is a suspected chemically peculiar star and formerly a candidate Lambda Boötis star. The status as a Lambda Boötis star was reviewed and changed
HD_179791
Star in the constellation Eridanus
main-sequence star, and the two stars have similar masses. The spectrum also shows excess of mercury and manganese, as it is a type of chemically peculiar star called
66_Eridani
Star in the constellation Antlia
which means it is a chemically peculiar star that shows strong indications of certain trace metals in its spectrum. However, the chemical peculiarity is now
Zeta2_Antliae
Star in the constellation Cancer
was 635 days. 15 Cancri A, the visible component, is an Ap star, a chemically peculiar star with an over-abundance of iron peak elements, particularly
15_Cancri
Star in the constellation Serpens
spectroscopic binary, but it is believed to be single. This is a chemically peculiar star Ap star with a stellar classification of A2 Vp MnEu(Sr), indicating
Chi_Serpentis
Star in the constellation Eridanus
equal to the star's rotation period. By 2019, ten pulsation frequencies had been found in the TESS data. HR 1217 is a chemically peculiar star, with particular
HR_1217
Binary star system in the constellation Orion
SX Arietis variable. The primary is a helium-strong, magnetic chemically peculiar star with a stellar classification of B1.5 Vp. It has a magnetic field
HD_37017
Star in the constellation Cancer
of A1 V. It is a chemically peculiar star, possibly of the magnetic-type (CP2), showing an abnormal abundance of strontium. The star is an estimated 336 million
34_Cancri
Star in the constellation Horologium
with a stellar classification of A3/5 III(m). It is a suspected chemically peculiar star of the metallic-line type. Beta Horologii has a relatively high
Beta_Horologii
Hypothetical types of stars
An exotic star is a hypothetical compact star composed of exotic matter (something not made of electrons, protons, neutrons, or muons), and balanced against
Exotic_star
Triple star system in the constellation Centaurus
magnitude 4.52 chemically peculiar star of the helium-weak (CP4) variety, and has a stellar classification of B5 III-IVp. The spectrum of the star displays
3_Centauri
Double star in the constellation Hydra
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
Beta_Hydrae
Star in the constellation Lyra
light-years around 8.5 million years from now. This is a magnetic chemically-peculiar star with a stellar classification of B8 IIIp Si Sr, showing abundance
19_Lyrae
Large self-illuminated object in space
all naturally occurring chemical elements heavier than lithium. Stellar mass loss or supernova explosions return chemically enriched material to the
Star
Star in the constellation Auriga
variable star when the Hipparcos data was analyzed. Because of that, it was given its variable star designation in 1999. This is a magnetic chemically peculiar
36_Aurigae
Star not gravitationally bound to any galaxy
An intergalactic star, also known as an intracluster star or a rogue star, is a star not gravitationally bound to any galaxy. Although a source of much
Intergalactic_star
Star in the constellation Sagittarius
hasn't had time to evolve from a less massive cluster star. It is a suspected chemically peculiar star. The spectral class from the calcium K line has been
7_Sagittarii
Star in the constellation Eridanus
(313 parsecs). HD 30963 is a late B-type star. It is a mercury-manganese star, a class of chemically peculiar star that has an overabundance of certain elements
HD_30963
Star in the constellation Aquila
−26 km/s. This is classified as a mercury-manganese star, which is a late B-type chemically peculiar star of type CP3. A distinctive feature of this class
HD_175640
Star in the constellation Aries
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
Gamma_Arietis
Star in the constellation Orion
star is moving further from the Sun with a heliocentric radial velocity of +16.8 km/s. This object is a chemically peculiar star, known as an Ap star
11_Orionis
Constellation in the southern celestial hemisphere
; Malaroda, S. (2000). "A spectroscopic study of the magnetic chemically peculiar star nu Fornacis". Astronomy and Astrophysics. 359: 635–638. Bibcode:2000A&A
Fornax
Star in the constellation Ophiuchus
mixed traits of a giant or bright giant star. The suffix notation indicates it is a candidate chemically peculiar star with an overabundance of manganese in
Mu_Ophiuchi
Star in the constellation Taurus
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:
Beta_Tauri
Binary star system in the constellation Vulpecula
component is a suspected chemically peculiar star with a stellar classification of A5 III, suggesting this is an evolved giant star. It has about 4.6 times
26_Vulpeculae
Star in the constellation Apus
recorded for a chemically peculiar star, measured at around 29 kG, and shows a strong quadrupolar component. Both variances of the star allow its rotation
HD_137509
Star in the constellation Cygnus
a B-type star with a stellar classification of B8p Si (Fe II), where the suffix notation indicates this is type of chemically peculiar star known as a
4_Cygni
Star in the constellation Auriga
but it is now considered doubtful whether it is actually a chemically peculiar star. This star has double the mass of the Sun and more than triple the Sun's
Psi8_Aurigae
Compact exotic star which forms matter consisting mostly of quarks
A quark star is a hypothetical type of compact, exotic star, where extremely high core temperature and pressure have forced nuclear particles to form
Quark_star
Chemically peculiar star in the constellation Auriga
distance to this star is approximately 2,020 light years based on parallax. This is an Ap star, a type of chemically peculiar star, in the giant stage
HD_35520
Gravitational process studied in astronomy
Star formation is the process by which dense regions within molecular clouds in interstellar space—sometimes referred to as "stellar nurseries" or "star-forming
Star_formation
Star in the constellation Taurus
404 light years from the Sun. This is a chemically peculiar star and was first classified as a silicon star by American astronomer William Morgan in
41_Tauri
Hypothetical early-universe star with a black hole core
A quasi-star or quasistar (QS), also called a black hole star, is a hypothetical type of extremely massive and luminous star that may have existed early
Quasi-star
Star in the constellation Centaurus
the stellar surface. In particular, HD 105382 is a helium-weak chemically peculiar star with a helium abundance varying between 0.5% and 15% of the solar
HD_105382
Star system in the constellation Draco
orbital motion can be observed. ν1 Draconis is an Am star, a slowly rotating chemically peculiar star with abnormally strong metallic absorption lines in
Nu_Draconis
Astronomical category of stars
In astronomy, the term iron star has been used for two observed types of star: Binary stars with highly variable emission and stellar spectral type Fe
Iron_star
Star in the constellation Canes Venatici
indicating some uncertainty in the classification. It is a marginally chemically-peculiar star with weaker than normal helium absorption lines and displaying
21_Canum_Venaticorum
Constellation split into two non-contiguous parts
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
Serpens
Blue star with strong helium lines
A helium star is a class O or B star (blue), which has extraordinarily strong helium lines and weaker than normal hydrogen lines, indicating strong stellar
Helium_star
Binary star system in the constellation Libra
classification of B3 V. It is a helium-weak chemically peculiar star and a rotating ellipsoidal variable. The star has an estimated 3.9 times the radius of
Lambda_Librae
Binary star system in the constellation Eridanus
class of A1, 2.28 times the mass of the Sun, and is a suspected chemically peculiar star. The secondary has magnitude 7.22, 1.56 times the Sun's mass, and
HD_29573
Star in the constellation Mensa
calculated to be 314 million years old. It has been catalogued as a chemically peculiar star with abnormally strong lines of silicon in its spectrum but this
Iota_Mensae
Star in the constellation Hercules
classification of B9VspHgMn. It is a chemically peculiar star of the type called a mercury-manganese star. The star is tentatively catalogued as an Alpha2
Phi_Herculis
diamond star Cygnus X-1 — X-ray source EBLM J0555-57Ab — is one of the smallest stars ever discovered. GY Andromedae — chemically peculiar variable star MACS
Lists_of_stars
Creation of chemical elements within stars
the star. Later in its life, a low-mass star will slowly eject its atmosphere via stellar wind, forming a planetary nebula, while a higher–mass star will
Stellar_nucleosynthesis
Variable star in the constellation Eridanus
Robert Davis reported that the star has an overabundance of silicon. It is classified as a chemically peculiar star. Henning Jorgensen et al. reported
HD_28843
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CHEMICALLY PECULIAR-STAR
CHEMICALLY PECULIAR-STAR
Surname or Lastname
Hungarian (Lándor)
Hungarian (Lándor) : from the old secular personal name Lándor.English : possibly a variant spelling of Lander.
Surname or Lastname
English
English : variant of Starr 1.English : from the medieval nickname Starre (see Starr 1) + man ‘servant’, hence an occupational name for the servant of a man known as ‘Star’.
Surname or Lastname
English
English : unexplained (Starns).
Surname or Lastname
Southern French (Péré)
Southern French (Péré) : topographic name from a variant of périer ‘pear tree’.Catalan : from the personal name Pere, Catalan equivalent of Peter.English : variant of Pear 1.Hungarian : from the old secular personal name Pere, Pöre.
Surname or Lastname
English
English : altered form of Starling.
Surname or Lastname
English (Kent)
English (Kent) : apparently a nickname from Middle English sterten ‘to leap or jump’ + up. Reaney and Wilson note that startup was the original form of ‘upstart’ and also the name of a kind of rustic boot and believe these senses may have contributed to the surname, although neither is recorded beofe the 16th century.
Surname or Lastname
English
English : patronymic from Stark.
Surname or Lastname
English
English : unexplained. Compare Starnes.
Surname or Lastname
English
English : habitational name from any of the various minor places, for example Start Point in Devon, named from Old English steort ‘tail’, in the transferred sense of a promontory or spur of a hill.
Surname or Lastname
English
English : from an agent derivative of Old English gangan ‘to walk’, hence possibly a nickname for someone with a peculiar gait; by the period of surname formation, however, the word had acquired the sense ‘go-between’ and it is likely that this meaning lies behind the surname in some instances.German (usually Gänger) : variant of Gengler.
Surname or Lastname
English
English : from Middle English starling ‘starling’ (Old English stærling), probably a nickname for a raucous or voracious person.
Surname or Lastname
German and Jewish (Ashkenazic)
German and Jewish (Ashkenazic) : occupational name for a purser, or for a purse-maker, from an agent derivative of Middle High German seckel, Yiddish zekl ‘purse’, ‘pouch’.English : from Old French seculier ‘secular’, hence a status name for a member of the secular clergy, or a nickname for someone without religious inclination.
Surname or Lastname
English
English : variant spelling of Starkey.
Surname or Lastname
English
English : variant spelling of Dear.Scottish : habitational name from (Old and New) Deer in Aberdeenshire.Hungarian : variant of Dér, from the secular personal name.
Surname or Lastname
English
English : nickname from Middle English sterre, starre ‘star’. The word was also used in a transferred sense of a patch of white hair on the forehead of a horse, and so perhaps the name denoted someone with a streak of white hair. It is possibly also a habitational name, for someone who lived at a house distinguished by the sign of a star.Jewish (Ashkenazic) : variant of Star 1 and 3.
Surname or Lastname
English
English : unexplained.Perhaps an Americanized spelling of Czech and Slovak Starý ‘old’ (see Stary).
Surname or Lastname
English
English : unexplained. Perhaps a nickname for a stormy-tempered person. Compare Stark.
Surname or Lastname
Americanized spelling of German Beiss(e), a variant of Beitz 2.English
Americanized spelling of German Beiss(e), a variant of Beitz 2.English : perhaps a variant of Biss. Compare Beese, Bise, Buys, Byce.Hungarian : nickname for someone with a limp or a peculiar gait, from bice ‘limp’.
Surname or Lastname
English, German (Starkmann), and Jewish (Ashkenazic)
English, German (Starkmann), and Jewish (Ashkenazic) : elaborated form of Stark.
Surname or Lastname
English
English : variant of Deeds.Hungarian : from a pet form of Déd, an old secular personal name.
CHEMICALLY PECULIAR-STAR
CHEMICALLY PECULIAR-STAR
CHEMICALLY PECULIAR-STAR
CHEMICALLY PECULIAR-STAR
CHEMICALLY PECULIAR-STAR
CHEMICALLY PECULIAR-STAR
CHEMICALLY PECULIAR-STAR
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