Newly discovered Wolf-Rayet and weak emission-line central stars of planetary nebulae

DePew, K., Parker, Q. A., Miszalski, B., De Marco, O., Frew, D. J., Acker, A., Kovacevic, A. V. and Sharp, R. G. (2011) Newly discovered Wolf-Rayet and weak emission-line central stars of planetary nebulae. Monthly Notices of the Royal Astronomical Society (MNRAS), 414 (4). pp. 2812-2827. ISSN 0035-8711
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We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the Macquarie/AAO/Strasbourg Ha (MASH) PN survey sample, and we have also uncovered 14 confirmed and candidate [WR]s and WELS among the CSPNe of previously known PNe. Spectral classifications have been undertaken using both Acker & Neiner and Crowther, De Marco & Barlow schemes. 22 members in this sample are identified as probable [WR] s; the remaining 10 appear to be WELS. Observations undertaken as part of the MASH spectroscopic survey have now increased the number of known [WR] s by similar to 30 per cent. This will permit a better analysis of [WR] subclass distribution, metallicity effects and evolutionary sequences in these uncommon objects.


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