Analysis of Magnetic Field Measurements for T Tau

摘要

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 approx= 85°. If, however, it later emerges that i > 10°, its magnetic field is essentially nondipolar and/or nonstationary.