TY - JOUR AU - Fernández Figueroa, María José AU - Montes Gutiérrez, David AU - Castro Rubio, Elisa De AU - Cornide Castro-Piñeiro, Manuel PY - 1994 DO - 10.1086/191866 SN - 0067-0049 UR - https://hdl.handle.net/20.500.14352/59663 T2 - Astrophysical journal supplement series AB - We report high-resolution observations of the Ca II H and K and Balmer H_α lines in 53 chromospherically active binary systems including the RS Canum Venaticorum binaries (RS CVn) and BY Draconis (BY Dra) classes. The rotational periods of the sample... LA - eng M2 - 433 PB - University Chicago Press KW - CVN system KW - Close binaries KW - Stars KW - Variability KW - Lines KW - Spectroscopy KW - Orbits TI - Ca II H and K and H_α emissions in chromospherically active binary-systems (RS Canum Venaticorum and BY Draconis) TY - journal article VL - 90 ER -