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Microvariability of spectral line profiles and magnetic fields of early-type stars: ζ Ori A

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Abstract

We report the results of spectropolarimetric observations of the supergiant ζ Ori A made with 6-m BTA telescope of the SAO RAS. We found regular variations of line profiles in the spectrum of the star with a period of 1–3 hours and point to their possible association with nonradial photospheric pulsations. We also searched for a possible weak magnetic field in ζ Ori A, but observations did not confirm the existence of such a field in the star considered.

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Authors and Affiliations

  1. Astronomical Institute, St. Petersburg State University, Bibliotechnaya pl. 2, Petrodvorets, 198504, Russia

    V. V. Dushin & A. F. Kholtygin

  2. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 369167, Russia

    G. A. Chountonov

Authors
  1. V. V. Dushin
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  2. A. F. Kholtygin
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  3. G. A. Chountonov
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Correspondence to V. V. Dushin.

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Original Russian Text © V.V. Dushin, A.F. Kholtygin, G.A. Chountonov, 2012, published in Astrofizicheskij Byulleten, 2012, Vol. 67, No. 1, pp. 71–77.

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Dushin, V.V., Kholtygin, A.F. & Chountonov, G.A. Microvariability of spectral line profiles and magnetic fields of early-type stars: ζ Ori A. Astrophys. Bull. 67, 67–72 (2012). https://doi.org/10.1134/S1990341312010063

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  • DOI: https://doi.org/10.1134/S1990341312010063

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