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

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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We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the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 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.

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

Keywords

stars: Wolf-Rayet
planetary nebulae: general
H-ALPHA SURVEY

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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abstract = "We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the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 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.",

keywords = "stars: Wolf-Rayet, planetary nebulae: general, H-ALPHA SURVEY",

author = "K. DePew and Parker, {Q. A.} and B. Miszalski and {De Marco}, O. and Frew, {D. J.} and A. Acker and Kovacevic, {A. V.} and Sharp, {R. G.}",

note = "The definitive version can be found at : http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society",

year = "2011",

month = jul,

doi = "10.1111/j.1365-2966.2011.18337.x",

language = "English",

volume = "414",

pages = "2812--2827",

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T1 - Newly discovered Wolf-Rayet and weak emission-line central stars of planetary nebulae

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.

N1 - The definitive version can be found at : http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society

PY - 2011/7

Y1 - 2011/7

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 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.

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 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.

KW - stars: Wolf-Rayet

KW - planetary nebulae: general

KW - H-ALPHA SURVEY

U2 - 10.1111/j.1365-2966.2011.18337.x

DO - 10.1111/j.1365-2966.2011.18337.x

M3 - Article

SN - 0035-8711

VL - 414

SP - 2812

EP - 2827

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

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

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Keywords

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