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Variable High Velocity Jets in the Symbiotic Star CH Cygni

Highly blue or red shifted broad emission components of H I lines have been noticed in some recent spectra of the symbiotic star CH Cyg. Their intensities, profiles, and displacements from the narrow component have changed with time scale of days. For example, a blue-shifted (−1545 km s−1) intense emission component and a red-shifted weak (+757 km s−1) emission were seen on 1994 September 9. One day after, the blue-shift and red-shift became −2076 km s−1 and +1285 km s−1, respectively.