| Issue |
A&A
Volume 401, Number 3, April III 2003
|
|
|---|---|---|
| Page(s) | 1057 - 1061 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20030156 | |
| Published online | 01 April 2003 | |
Possible detection of a magnetic field in T Tauri
1
Sternberg Astronomical Institute, Moscow V-234 119992, Russia
2
Isaak Newton Institute of Chile Branch in Moscow, Russia
3
Special Astrophysical Observatory, Nizhnij Arkhyz 357147, Russia
Corresponding author: D. Smirnov, danila@sai.msu.ru
Received:
24
June
2002
Accepted:
6
January
2003
Medium-resolution 
circular spectropolarimetry of
T Tauri is presented. The star was observed twice: on November 11, 1996 and
January 22, 2002. Weak circular polarization was found in photospheric
absorption lines, indicating a mean surface longitudinal magnetic field
of 
G and 
G at the epoch of the first and
second observations respectively. While these values are near the detection
limit of our apparatus, we belive that they are real. One can
conclude from our data that of T Tau does not significantly exceed
200 G, which is much less than surface magnetic field strength of the star
(>2.3 kG) found by Guenther et al. (1999) and Johns-Krull et al. (2000).
We discuss possible reasons for this difference.
Key words: stars: pre-main sequence / stars: magnetic fields / stars: individual: T Tau
© ESO, 2003
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