Abundance Analysis of a Sample of Bipolar Type I Planetary Nebulae

Details Abundance Analysis of a Sample of Bipolar Type I Planetary Nebulae Abundance Analysis of a Sample of Bipolar Type I Planetary Nebulae

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..804...61l&link_type=abstract

PLANETARY NEBULAE AS ASTRONOMICAL TOOLS: International Conference on Planetary Nebulae as Astronomical Tools. AIP Conference Pr

Astronomy and Astrophysics

Astronomy

Planetary Nebulae, Element Relative Abundance, Stellar Composition, Stellar Photometry, Planetary Nebulae, Planetary Nebulae, Abundances, Chemical Composition

Scientific paper

We present the results of deep long-slit spectrophotometric observations of several bipolar planetary nebulae, selected because they show anomalously large [NII]/Hα ratios. The spatially resolved study of these spectra, obtained with the Palomar 5m double spectrograph and the Intermediate Dispersion Spectrograph at the 2.5m INT (La Palma), include the analysis of various diagnostic lines which allow us to test whether the presence of shocks, the bipolar geometry and/or the existence of abundance gradients might account for the observed emission line ratios.

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