The evolution of Ap stars
P. North (1), J. Babel (2), D. Erspamer (3) ((1) Ecole Polytechnique, F\'ed\'erale de Lausanne (EPFL), Switzerland, (2) Neuch\^atel, Switzerland,, (3) St-Maurice, Switzerland)
TL;DR
This paper reviews thirty years of evidence on how Ap stars' chemical peculiarities, magnetic fields, and rotation evolve during their main-sequence phase, with a focus on their HR diagram positions.
Contribution
It provides a comprehensive review of observational evidence for the evolution of Ap stars' properties and their HR diagram positions, emphasizing recent research findings.
Findings
Chemical peculiarities and magnetic fields vary during main-sequence evolution
Magnetic Ap stars occupy specific regions in the HR diagram
Recent data supports evolution of rotation and magnetic properties
Abstract
The many peculiarities of Ap stars (not only chemical ones, but also magnetic field and slow rotation) may vary during the main-sequence evolution of these stars. We review here briefly the evidences found in the last thirty years for such evolution, with an emphasis on the more recent research. The position in the HR diagram of low mass Ap stars with a significant surface magnetic field (as measured by us) is reviewed as well.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astro and Planetary Science