Abstract
We have obtained CCD spectra for 30 chromospherically active binaries using the 2.16 m telescope at Beijing Observatory in 1995. Our purpose was to search for the presence ofH α emission which is characteristic of stars with extreme levels of chromospheric activity. Spectra of V711 Tau, V471 Tau, HD 12545 and V833 Tau presentedH α emission above the continuum in the different degree. TheH α behavior of the other observed 26 active binaries, which were unknown in CABS (1993), has been discovered in this paper. TheH α profiles of the most among 26 systems are partially filled-in by chromospheric emission. TheH α profiles of a few systems show a pure absorption line. The results are given in Table I.
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supported by the National Natural Science Foundation of China
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Xuefu, L., He, H. & Wenbai, Z. A newH α survey of chromospherically active binaries (II). Astrophys Space Sci 246, 39–50 (1996). https://doi.org/10.1007/BF00637398
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DOI: https://doi.org/10.1007/BF00637398