Analysis of chemical abundances in planetary nebulae with [WC] central stars

Abstract:
Planetary nebulae (PNe) around Wolf-Rayet [WR] central stars ([WR]PNe) constitute a particular 
photoionized nebula class that represents about 10% of the PNe with classified central stars. We analyse 
deep high-resolution spectrophotometric data of 12 [WR] PNe. This sample of [WR]PNe represents the 
most extensive analysed so far, at such high spectral resolution. We aim to select the optimal physical 
conditions in the nebulae to be used in ionic abundance calculations. We present determination of the 
physical conditions (Te and Ne), ionic abundances and total abundances for the sample.