Variation in the low velocity emission line components of [N II] 6583 Å; from top: 55 314 (solid), JD 55 334 (dot), 55 370 (dash), 55 397 (dot-dash). The emission hole at around −54 km s-1, corresponding to the maximum in the narrow [O I] emission, remained constant. This indicates the presence of large density contrasts in the circumstellar material, comparing the −40 km s-1 and −20 km s-1 features; some weakening appeared also for the −80 km s-1 feature. These coincided with the emission/absorption components on Na I D (see text).
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