EDP Sciences

Vol. 601
In section 7. Stellar structure and evolution

Ap stars with resolved magnetically split lines: Magnetic field determinations from Stokes I and V spectra

by G. Mathys, A&A, 601, A14

Magnetic fields have been known in the chemically peculiar stars since the 1940s. Discovered and measured photographically, the fields were biased toward resolvable lines, and with relatrively low signal-to-noise in the strongest fields. This paper is the culmnination of a comphensive program of integrated and polarized light measurements over nearly a decade and analysis of a very large sample (43) of the strongest field stars. It is the definitive one-stop-study, presenting a detailed evaluation of field strengths and geometries, including quadratic Zeeman effect measurements, binarity, rotation, and secular evolution.