The Complex IUE Spectrum of the ``O VI Sequence'' Planetary Nebula NGC 2867

Astronomy and Astrophysics – Astronomy

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Ultraviolet: Ism, Ism: Planetary Nebulae: Individual Ngc Number: Ngc 2867, Stars: Mass Loss

Scientific paper

The IUE spectrum of the planetary nebula NGC 2867 and its central star displays a rich variety of emission lines that has not been reported before. Fluxes for more than 80 UV features were determined from low- and high-dispersion spectra. Electron densities of log Ne = 3.4 +/- 0.1 cm-3 from C III], log Ne = 3.9 +/- 0.2 cm-3 from [Ne IV], and log Ne = 3.25 +/- 0.2 cm-3 from O IV] diagnostics were derived. Detection of O VIII lines (I.P. = 871 eV) are thought to require a corona or strong stellar winds, yet no strong P Cygni profiles were observed. Several resonantly excited Fe II lines were identified.

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