Fig. 4

Comparison of FUSE and IUE terminal velocities in the CSPNe of NGC 2392 (left) and NGC 6826 (right). The top panels show the normalized P Cygni profiles of the NGC 2392 C iii λ977.0 and NGC 6826 O vi λ1037.6 lines derived from FUSE data. The middle and bottom panels show respectively the C iv λ1548.2 and N v λ1238.8 normalized P Cygni profiles of NGC 2392 (left) and NGC 6826 (right) derived from IUE data. The FUSE and IUE (Patriarchi & Perinotto 1991) terminal velocities are shown by dashed vertical lines.
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