Results 181 to 190 of about 469 (213)
On the Incidence of Chemically Peculiar Stars in the Large Magellanic Cloud [PDF]
Monthly Notices of the Royal Astronomical Society, 2005 7 pages, 1 figure, accepted by ...
Ernst Paunzen +2 more
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Chemically peculiar stars in binaries
EAS Publications Series, 2013Strong photospheric chemical peculiarities are observed in a significant fraction of main sequence stars from B to early F spectral types. The development of these chemical peculiarities is understood in the framework of atomic diffusion. However, the details leading from this theoretical framework to the diversity of observed surface abundance ...
C.P. Folsom, G.A. Wade, E. Alecian
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An Investigation of the Rotational Properties of Magnetic Chemically Peculiar Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 13 pages, 9 figures, accepted for publication in MNRAS, updated to match the published ...
Klaus Bernhard +2 more
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Astrophysics and Space Science, 1996
The upper main sequence is home to a diverse family of chemically peculiar stars, including λ Boo, Am-Fm, Bp-Ap, HgMn, He-weak, and He-rich varieties. This paper presents an informal review of the physical properties of these objects, including their location in the H-R diagram, frequency of incidence, rotation, binarity, magnetic fields, and ...
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The upper main sequence is home to a diverse family of chemically peculiar stars, including λ Boo, Am-Fm, Bp-Ap, HgMn, He-weak, and He-rich varieties. This paper presents an informal review of the physical properties of these objects, including their location in the H-R diagram, frequency of incidence, rotation, binarity, magnetic fields, and ...
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New magnetic chemically peculiar stars
Astronomy Letters, 2002Spectropolarimetric observations of 96 chemically peculiar (CP) main-sequence stars have been carried out at the 6-m telescope at the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) with the aim of searching for the presence of stellar magnetic fields.
Kudryavtsev, Dmitrii O. +2 more
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The chemically peculiar stars of the upper main sequence
Nuclear Instruments and Methods, 1973Abstract Abundance anomalies of two classes of peculiar main sequence stars are reviewed. The anomalies include gross overabundances of some elements and deficiencies of others. Isotopic abundances of three elements appear to be abnormal.
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A-Type and Chemically Peculiar Stars
1993Conventional wisdom holds that early-type and late-type stars should have very different outer atmospheres, because the early-type stars lack deep convective zones and thus a mechanical energy source to heat their outer layers. I will show that the magnetic chemically peculiar (CP) stars hotter than about spectral type A2 display many of the phenomena ...
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Study of pulsations of chemically peculiar a stars
Astrophysical Bulletin, 2014Rapidly oscillating chemically peculiar A stars (roAp) pulsate in high-overtone, low degree p-modes and form a sub-group of chemically peculiar magnetic A stars (Ap). Until recently, the classical asteroseismic research, i.e., frequency analysis, of these stars was based on photometric observations both ground-based and space-based.
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Magnetic fields of chemically peculiar stars
Astrophysics, 2012Models of the magnetic fields of 60 chemically peculiar (CP) stars are examined. The modelling technique assumes an internal structure of the magnetic field similar to a theoretical magnetic dipole. The magnetic field structures of most of the stars are not symmetric with respect to the center of the star.
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The surface composition of chemically peculiar stars
Journal of Physics G: Nuclear and Particle Physics, 1993The surface chemical composition of a star can be altered by different mechanisms, such as internal nucleosynthesis and the mixing of this material to the star's surface, mass transfer in a binary system, or compositional differences in the gas from which stars form.
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