# 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}
}
• Published 19 January 2006
• Physics
• Astronomy and Astrophysics
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…
132 Citations

## Figures and Tables from this paper

Magnetic B-type stars of the main sequence. I. Problem formulation and selection of objects for observations
• Physics
• 2012
This paper reviews the current state of the problem of magnetism in massive Main Sequence stars. Chemically peculiar Bp stars with enhanced silicon lines and anomalous helium lines in their spectra
Magnetic chemically peculiar stars: Results of CCD magnetic field measurements with the 6‐m telescope
We present a survey of observational data on the magnetic fields and physical parameters of chemically peculiar (CP) stars for the past 15–20 years. It appears that the traditional notions on
Catalogue of averaged stellar effective magnetic fields -II. Re-discussion of chemically peculiar A and B stars
• Physics
• 2009
This paper presents a catalogue and the method of determining averaged quadratic effective magnetic fields (Be) for 1212 main-sequence and giant stars, and 11 white dwarf stars. The catalogue
An investigation of the rotational properties of magnetic chemically peculiar stars
• Physics
• 2017
The magnetic chemically peculiar (mCP) stars of the upper main sequence exhibit strong, globally organized magnetic fields that are inclined to the rotational axis and facilitate the development of
Main-sequence magnetic CP stars: II. Physical parameters and chemical composition of the atmosphere
This paper continues a series of reviews dedicated to magnetic CP stars. The occurrence frequency of CP stars among B5–F0-type main-sequence stars is shown to be equal to about 15–20%. The problems
Evidence of magnetic field decay in massive main-sequence stars
• Physics, Geology
• 2016
A significant fraction of massive main-sequence stars show strong, large-scale magnetic fields. The origin of these fields, their lifetimes, and their role in shaping the characteristics and
A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars
• Physics
• 2012
About 10 per cent of upper main-sequence stars are characterized by the presence of chemical peculiarities, often found together with a structured magnetic field. The atmospheres of most of those
Searching for links between magnetic fields and stellar evolution III. Measurement of magnetic fields in open cluster Ap stars with ESPaDOnS
• Physics, Geology
• 2008
Context. A small fraction of upper main sequence stars have strong, highly structured magnetic fields. The origin and evolution of these fields are not adequately understood. Aims. We are carrying
New Photometrically Variable Magnetic Chemically Peculiar Stars in the ASAS-3 Archive
• Physics
• 2016
The magnetic Ap or CP2 stars are natural atomic and magnetic laboratories and ideal testing grounds for the evaluation of model atmospheres. CP2 stars exhibiting photometric variability are
Model atmospheres of magnetic chemically peculiar stars - A remarkable strong-field Bp SiCrFe star HD 137509
• Physics
• 2008
Context. In the last few years we have developed stellar model atmospheres which included effects of anomalous abundances and strong magnetic field. In particular, the full treatment of a nomalous

## References

SHOWING 1-10 OF 76 REFERENCES
On the formation and evolution of magnetic chemically peculiar stars in the solar neighborhood
• Physics
• 2005
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 sample
Magnetic Ap Stars in the Hertzsprung-Russell Diagram
• Physics
• 2000
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 from
On the evolutionary status of chemically peculiar stars of the upper main sequence
• Physics
• 2003
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 reach
Catalogue of averaged stellar effective magnetic fields - I. Chemically peculiar A and B type stars
• Physics
• 2003
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 is
A fossil origin for the magnetic field in A stars and white dwarfs
• Physics, Geology
Nature
• 2004
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.
Investigation of the magnetic field characteristics of Herbig Ae/Be stars: Discovery of the pre-main sequence progenitors of the magnetic Ap/Bp stars
• Physics
• 2005
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)
Magnetic fields in white dwarfs and stellar evolution
• Physics, Geology
• 2004
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 of
The mean magnetic field modulus of Ap stars
• Physics
• 1997
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 having
Magnetic field measurements of Ap stars - Discovery of a strong magnetic field in HD 18610
• Physics
• 2003
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 raw
A highly sensitive search for magnetic fields in B, A and F stars
• Physics
• 2002
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 22