A Evolutionary Study of Magnetic Ap Stars in Three Open Clusters

Details A Evolutionary Study of Magnetic Ap Stars in Three Open Clusters A Evolutionary Study of Magnetic Ap Stars in Three Open Clusters

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jrasc..99s.144s&link_type=abstract

Journal of the Royal Astronomical Society of Canada, Vol. 99, No. 4, p.144

Astronomy and Astrophysics

Astronomy

Scientific paper

I will present the first results of a study of magnetic chemically peculiar stars in open clusters. Using high-resolution circular spectropolarimetric observations obtained using the MuSiCoS spectropolarimeter on the 2-metre Bernard Lyot telescope at Pic du Midi observatory, chemical peculiarities and magnetic field strengths have been determined for six Ap stars in three open clusters. The aim of this study is to provide new information about the evolution of chemical peculiarities and magnetic fields of Ap stars. Because open-cluster ages can be accurately determined based on the evolution of chemically normal stars, this method allows the determination of the evolutionary state of chemically peculiar cluster members without the requirement that they be accurately positioned on the HR diagram (a procedure fraught with complications).

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