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

K. Depew; Q. A. Parker; B. Miszalski; O. De Marco; D. J. Frew; A. Acker; A. V. Kovacevic; R. G. Sharp

doi:10.1111/j.1365-2966.2011.18337.x

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

K. Depew^*, Q. A. Parker, B. Miszalski, O. De Marco, D. J. Frew, A. Acker, A. V. Kovacevic, R. G. Sharp

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the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 Hα (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 ∼30per cent. This will permit a better analysis of [WR] subclass distribution, metallicity effects and evolutionary sequences in these uncommon objects.

Original language	English
Pages (from-to)	2812-2827
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	414
Issue number	4
DOIs	https://doi.org/10.1111/j.1365-2966.2011.18337.x
Publication status	Published - Jul 2011

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title = "Newly discovered Wolf-Rayet and weak emission-line central stars of planetary nebulae",

abstract = "We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the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 Hα (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 ∼30per cent. This will permit a better analysis of [WR] subclass distribution, metallicity effects and evolutionary sequences in these uncommon objects.",

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AU - Depew, K.

AU - Parker, Q. A.

AU - Miszalski, B.

AU - De Marco, O.

AU - Frew, D. J.

AU - Acker, A.

AU - Kovacevic, A. V.

AU - Sharp, R. G.

PY - 2011/7

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N2 - 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 Hα (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 ∼30per cent. This will permit a better analysis of [WR] subclass distribution, metallicity effects and evolutionary sequences in these uncommon objects.

AB - 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 Hα (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 ∼30per cent. This will permit a better analysis of [WR] subclass distribution, metallicity effects and evolutionary sequences in these uncommon objects.

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JO - Monthly Notices of the Royal Astronomical Society

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ER -

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

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