Top: the three [N II] profiles for JD 55 357, [N II] 5754 Å (dot-dash), 6546 Å (dash), 6583 Å (solid). Bottom: [N II] nebular diagnostic giving the electron density (ne) as a function of radial velocity for Te = 104 K for JD 55 357 (solid) and JD 55 369 (dash). The flux was dereddened using E(B − V) = 0.5 and the underlying continuum and Hα emission wing were subtracted (see text).
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