Density and Excitation Mapping of M2-9
We have acquired imaging of the bipolar outflow M2-9 in the transitions [O III] λ5007, H I λ6563, [N II] λ6584, and [S II] λλ6717, 6731. As a result, we are able to map both excitation and density over the face of the nebula. We find that underlying densities in the lobes increase to ne~1.6x103 cm-3 at distances rp~12"-15" from the central star
Cuesta, L. et al.
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1999