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        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        We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the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.
        Publication date
        2011-07
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1111/j.1365-2966.2011.18337.x
        Other links
        http://hdl.handle.net/2299/6594
        Relations
        School of Physics, Astronomy and Mathematics
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