Newly discovered Wolf-Rayet and weak emission-line central stars of planetary nebulae
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Author
DePew, K.
Parker, Q. A.
Miszalski, B.
De Marco, O.
Frew, D. J.
Acker, A.
Kovacevic, A. V.
Sharp, R. G.
Attention
2299/6594
Abstract
We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the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.