Follow-up Zeeman observations of the T Tauri star RU Lup

Astronomy and Astrophysics – Astronomy

Scientific paper

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Stellar Magnetic Fields, T Tauri Stars, Zeeman Effect, Circular Polarization, Field Strength, Optical Polarization

Scientific paper

The authors have obtained further Zeeman observations of the extreme T Tauri star RU Lup. They fail to confirm the suggestion of the presence of a magnetic field obtained in earlier work. A 3σ upper limit of 494 G is obtained for the mean longitudinal field strength if the present and previous data are averaged. A 3σ upper limit of 0.12 per cent is set for the average circular polarization around 5100 Å.

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