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| Paper: |
Multiwavelength Optical Observations of Chromospherically Active Binary Systems |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
1450 |
| Authors: |
Sanz-Forcada, J.; Montes, D.; Fernandez-Figueroa, M. J.; de Castro, E.; Cornide, M. |
| Abstract: |
We have studied the chromosphere of active binary systems using the information provided by several optical spectroscopic features that could be used as chromospheric activity indicators. The simultaneous observations of different lines, that are formed at different heights in the chromosphere (from the region of temperature minimum to the higher chromosphere), are of special interest for stellar activity studies since they provide very useful information about this stellar region. In Paper I we have analysed, using the spectral subtraction technique, simultaneous H alpha, Na I D_1, D_2, and He I D_3 spectroscopic observations for 18 systems, and in Paper II the H alpha, H beta, Na I D_1, D_2, He I D_3, Mg I b triplet, Ca II H & K, and Ca II infrared triplet lines of the RS CVn system EZ Pegasi have been studied. In this contribution we focus our study on the preliminary analysis of SOFIN echelle spectra (covering H alpha, H beta, Na I D_1, D_2, He I D_3, Ca II H & K, and Ca II lambda 8662 lines) of five chromospherically active binary systems: UX Ari, Sigma Gem, BF Lyn, DK Dra and OU Gem. |
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