Physics
Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phdt.........2n&link_type=abstract
PhD thesis, Universite Louis Pasteur de Strasbourg, 2002.
Physics
3
Pulsation, Rotation, Wind, Magnetic Field, Be, Beta Cep And Spb Stars
Scientific paper
In this PhD thesis I have concentrated on the pulsation and magnetic properties of three different kinds of early B-type stars: Be, beta Cephei and Slowly Pulsating B (SPB) stars. I present in-depth studies of a few carefully chosen targets, which are representative for the variety of phenomena associated with these massive stars. In all studied stars new non-radial pulsation modes are found. By studying the UV stellar wind variations I could derive the rotational period of these stars very precisely, which allowed me to search for the presence of a magnetic field. Magnetic fields were indeed found in these stars, which I have modeled as simple dipole fields with a typical strength of a few hundred Gauss, inclined with the stellar rotation axis. With present-day instrumentation this is about the weakest field that can be detected in such stars. With no exception, abundance anomalies are found to be associated with these magnetic stars, for which I carried out a quantitative analysis.
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