No detection of large-scale magnetic fields at the surfaces of Am and HgMn stars

  title={No detection of large-scale magnetic fields at the surfaces of Am and HgMn stars},
  author={M. Auri{\`e}re and G. A. Wade and F. Lignieres and A. Hui-Bon-Hoa and J. Landstreet and I. Iliev and J.-F. Donati and P. Petit and T. Roudier and S. Th'eado},
  journal={Astronomy and Astrophysics},
  • M. Aurière, G. A. Wade, +7 authors S. Th'eado
  • Published 2010
  • Physics
  • Astronomy and Astrophysics
  • Aims. We investigate the magnetic dichotomy between Ap/Bp and other A-type stars by carrying out a deep spectropolarimetric study of Am and HgMn stars. Methods. Using the NARVAL spectropolarimeter at the Telescope Bernard Lyot (Observatoire du Pic du Midi, France), we obtained high-resolution circular polarisation spectroscopy of 12 Am stars and 3 HgMn stars. Results. Using least squares deconvolution (LSD), no magnetic field is detected in any of the 15 observed stars. Uncertaintiies as low as… CONTINUE READING
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