Volume 396, Number 1, December II 2002
|Page(s)||203 - 211|
|Section||Interstellar and circumstellar matter|
|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, firstname.lastname@example.org
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
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.