Evolutionary state of magnetic chemically peculiar stars

@article{Kochukhov2006EvolutionarySO,
  title={Evolutionary state of magnetic chemically peculiar stars},
  author={Oleg Kochukhov and S Bagnulo},
  journal={Astronomy and Astrophysics},
  year={2006},
  volume={450},
  pages={763-775}
}
Context. The photospheres of about 5–10% of the upper main sequence stars exhibit remarkable chemical anomalies. Many of these chemically peculiar (CP) stars have a global magnetic field, the origin of which is still a matter of debate. Aims. We present a comprehensive statistical investigation of the evolution of magnetic CP stars, aimed at providing constraints to the theories that deal with the origin of the magnetic field in these stars. Methods. We have collected from the literature data… Expand
Magnetic B-type stars of the main sequence. I. Problem formulation and selection of objects for observations
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References

SHOWING 1-10 OF 76 REFERENCES
On the formation and evolution of magnetic chemically peculiar stars in the solar neighborhood
In order to put strict observational constraints on the evolutionary status of the magnetic chemically peculiar stars (CP2) of the upper main sequence, we have investigated a well established sampleExpand
Magnetic Ap Stars in the Hertzsprung-Russell Diagram
The evolutionary state of magnetic Ap stars is rediscussed using the recently released Hipparcos data. The distribution of the magnetic Ap stars of mass below 3 M☉ in the H-R diagram differs fromExpand
On the evolutionary status of chemically peculiar stars of the upper main sequence
We present further evidence that the magnetic chemically peculiar stars (CP2) of the upper main sequence already occur at very early stages of the stellar evolution, significantly before they reachExpand
Catalogue of averaged stellar effective magnetic fields - I. Chemically peculiar A and B type stars
This paper presents the catalogue and the method of determination of averaged quadratic effective magnetic fields $\langle B_{\rm e} \rangle$ for 596 main sequence and giant stars. The catalogue isExpand
A fossil origin for the magnetic field in A stars and white dwarfs
TLDR
Numerical simulations show that stable magnetic field configurations, with properties agreeing with those observed, can develop through evolution from arbitrary, unstable initial fields, establishing fossil fields as the natural, unifying explanation for the magnetism of all these stars. Expand
Investigation of the magnetic field characteristics of Herbig Ae/Be stars: Discovery of the pre-main sequence progenitors of the magnetic Ap/Bp stars
We are investigating the magnetic characteristics of pre-main sequence Herbig Ae/Be stars, with the aim of (1) understanding the origin and evolution of magnetism in intermediate-mass stars, and (2)Expand
Magnetic fields in white dwarfs and stellar evolution
The surface magnetic field strengths observed in the magnetic Ap, Bp stars (100-20000 G) and in the high field magnetic white dwarfs (10 6 -10 9 G) cover many decades but nevertheless the range ofExpand
The mean magnetic field modulus of Ap stars
We present new measurements of the mean magnetic eld modulus of a sample of Ap stars with spec- tral lines resolved into magnetically split components. We report the discovery of 16 new stars havingExpand
Magnetic field measurements of Ap stars - Discovery of a strong magnetic field in HD 18610
HD 18610 was included in our project on abundance determination of rapidly oscillating (roAp) and non–oscillating (noAp) cool chemically peculiar stars. Already a preliminary investigation of the rawExpand
A highly sensitive search for magnetic fields in B, A and F stars
Circular spectropolarimetric observations of 74 stars were obtained in an attempt to detect magnetic fields via the longitudinal Zeeman eect in their spectral lines. The sample observed includes 22Expand
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