Detection of a weak surface magnetic field on Sirius A: are all tepid stars magnetic?

  title={Detection of a weak surface magnetic field on Sirius A: are all tepid stars magnetic?},
  author={P. Petit and F. Ligni{\`e}res and M. Auri{\`e}re and G. Wade and D. Alina and J. Ballot and T. Bohm and L. Jouve and A. Oza and F. Paletou and S. Th'eado},
  journal={Astronomy and Astrophysics},
  • P. Petit, F. Lignières, +8 authors S. Th'eado
  • Published 2011
  • Physics
  • Astronomy and Astrophysics
  • Aims. We aim at a highly sensitive search for weak magnetic fields in main sequence stars of intermediate mass, by scanning classes of stars with no previously reported magnetic members. After detecting a weak magnetic field on the normal, rapidly rotating A-type star Vega, we concentrate here on the bright star Sirius A, taken as a prototypical, chemically peculiar, moderately rotating Am star. Methods. We employed the NARVAL and ESPaDOnS high-resolution spectropolarimeters to collect 442… CONTINUE READING
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