| Issue |
A&A
Volume 396, Number 1, December II 2002
|
|
|---|---|---|
| Page(s) | 203 - 211 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20021424 | |
| Published online | 22 November 2002 | |
Starspots and active regions on the emission red dwarf star 
*
Crimean Astrophysical Observatory, P/O Nauchny, 98409 Crimea, Ukraine Isaac Newton Institute of Chile, Crimean Branch, Ukraine
Corresponding author: I. Yu. Alekseev, ilya@crao.crimea.ua
Received:
19
October
2001
Accepted:
26
September
2002
The quasi-simultaneous electrophotometric, polarimetric and spectroscopic
observations of the single active spotted star 
are presented. The
photometric variability of the star can be described completely by a zonal
starspots model. Spotted regions occupy up to 23% of the total stellar
surface. The temperature difference between the unspotted photosphere and
starspots is about 
K. Starspots are localized at the low and middle
latitudes. We find for the first time broad-band linear polarization of the
stellar light and its rotational modulation connected to the local magnetic
region on the stellar surface. We suspect that there is a spacial connection
between plages, magnetic regions and the mostly spotted stellar longitudes.
Key words: stars: activity / stars: chromospheres / stars: magnetic fields / starspots
© ESO, 2002
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