Starspots and active regions on the chromospherically active binary MS Ser

Free access article

Issue		A&A Volume 403, Number 1, May III 2003


Page(s)		205 - 215
Section		Stellar atmospheres
DOI		http://dx.doi.org/10.1051/0004-6361:20030308

A&A 403, 205-215 (2003)
DOI: 10.1051/0004-6361:20030308

Starspots and active regions on the chromospherically active binary MS Ser

I. Yu. Alekseev and O. V. Kozlova

Crimean Astrophysical Observatory, P/O Nauchny, 98409 Crimea, Ukraine; and Isaac Newton Institute of Chile, Crimean Branch, Ukraine
(Received 27 November 2002 / Accepted 28 February 2003)

Abstract
The quasisimultaneous electrophotometric, polarimetric and spectroscopic observations of the chromospherically active binary MS Ser are presented. The photometric variability of the star can be described completely by a zonal spottedness model. Spotted regions occupy up to 21% of the total stellar surface. The temperature difference between the unspotted photosphere and starspots is about 1300 K. Starspots are localized at the middle latitudes. We detected the broad-band linear polarization of the stellar light and its rotational modulation connected with the local magnetic region on the stellar surface. We suspect that there is a space connection between plages, magnetic regions and the mostly spotted stellar longitudes.

Key words: stars: activity -- stars: chromospheres -- stars: magnetic fields -- stars: starspots

Offprint request: I. Yu. Alekseev, ilya@crao.crimea.ua

SIMBAD Objects

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.