Newly Discovered Wolf-Rayet and Weak Emission-Line Central Stars of Planetary Nebulae

We present spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). Eighteen stars have been discovered in the Macquarie/AAO/Strasbourg H-Alpha (MASH) PN survey sample, and we have also uncovered 14 confi...

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Bibliographic Details
Published in:arXiv.org 2011-01
Main Authors: DePew, Kyle, Parker, Quentin A, Miszalski, Brent, Orsola De Marco, Frew, David J, Acker, Agnes, Kovacevic, Anna V, Sharp, Rob G
Format: Article
Language:English
Subjects:
Extrasolar planets
Metallicity
Nebulae
Planetary nebulae
Stars
Online Access:Get full text
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Summary:We present spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). Eighteen stars have been discovered in the Macquarie/AAO/Strasbourg H-Alpha (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 the Acker & Neiner and Crowther, De Marco & Barlow schemes. Twenty-two 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 ~30 per cent. This will permit a better analysis of [WR] subclass distribution, metallicity effects, and evolutionary sequences in these uncommon objects.
ISSN:2331-8422
DOI:10.48550/arxiv.1101.2468