Fig. 3
Hα (top) and Hβ (bottom) line profiles for the core of M 2–9 (black solid line), north blob (red dotted line), and south blob (blue dashed lines). Velocities in the abscissae are heliocentric. All profiles have been normalized for easier comparison. Note that local structures in the Hβ profiles of the blobs are not real, but caused by a modest signal-to-noise ratio.
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