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Analysis of magnetic field measurements for T Tau

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Abstract

The presence of hot spots on the surface of T Tau attributable to mass accretion from the protoplanetary disk is shown to have virtually no effect on the accuracy of estimating the magnetic field strength for this star. By comparing the magnetic field strengths for T Tau at the photospheric level measured by various methods, we found that if the angle i at which we see T Tau does not exceed 10°, then the magnetic field of the star could be dipolar with the angle between the dipole axis and the rotation axis of the star ≃85°. If, however, it later emerges that i > 10°, its magnetic field is essentially nondipolar and/or nonstationary.

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Authors and Affiliations

  1. Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119992, Russia

    D. A. Smirnov & S. A. Lamzin

  2. Department of Astronomy, Cornell University, 410 Space Sciences Building, Ithaca, NY, 14853-680, USA

    M. M. Romanova

Authors
  1. D. A. Smirnov
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  2. M. M. Romanova
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  3. S. A. Lamzin
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Translated from Pis’ma v Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 31, No. 5, 2005, pp. 372–377.

Original Russian Text Copyright © 2005 by Smirnov, Romanova, Lamzin.

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Smirnov, D.A., Romanova, M.M. & Lamzin, S.A. Analysis of magnetic field measurements for T Tau. Astron. Lett. 31, 335–339 (2005). https://doi.org/10.1134/1.1922532

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  • DOI: https://doi.org/10.1134/1.1922532

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