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

Abstract

We present spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe).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

19 pages, 5 figures, 4 tables, accepted for publication in MNRAS

References in corpus (16)

• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• Physical Properties of Wolf-Rayet Stars
• The Second-Generation Guide Star Catalog: Description and Properties
• Binary Planetary Nebulae Nuclei towards the Galactic Bulge. I. Sample Discovery, Period Distribution and Binary Fraction
• A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS Point Source Catalogue
• MASH-II: More Planetary Nebulae from the AAO/UKST HαSurvey
• Central Stars of Planetary Nebulae: New spectral classifications and catalogue
• The hydrogen-deficient knot of the `born again' planetary nebula Abell 58 (V605 Aql)
• Planetary nebulae with emission-line central stars
• Abundances in the Galactic bulge: results from planetary nebulae and giant stars
• SPITZER SAGE Observations of Large Magellanic Cloud Planetary Nebulae
• Multi-wavelength diagnostic properties of Galactic Planetary Nebulae detected by GLIMPSE-I
• Identification of NeVIII lines in H-deficient (pre-) white dwarfs: a new tool to constrain the temperature of the hottest stars
• V605 Aquilae: a born again star, a nova or both?
• A Catalogue of Be Stars in the Direction of the Galactic Bulge
• A view of the solar neighbourhood: the local population of planetary nebulae and their mimics

Cited by in corpus (33)

• Ionizing spectra of stars that lose their envelope through interaction with a binary companion: role of metallicity
• Spatial distribution of Galactic Wolf-Rayet stars and implications for the global population
• A catalogue of integrated H-alpha fluxes for 1,258 Galactic planetary nebulae
• A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. IV. A Final Census
• Oxygen enrichment in carbon-rich planetary nebulae
• Symbiotic stars and other Halpha emission line stars towards the Galactic Bulge
• Catalogue of central stars of planetary nebulae: Expanded edition
• New light on Galactic post-asymptotic giant branch stars. I. First distance catalogue
• The Chandra Planetary Nebula Survey (ChanPlaNS). II. X-ray Emission from Compact Planetary Nebulae
• Analysis of chemical abundances in planetary nebulae with [WC] central stars. I. Line intensities and physical conditions
• Identification of new Galactic symbiotic stars with SALT. I. Initial discoveries and other emission line objects
• Abell 48 - a rare WN-type central star of a planetary nebula
• The planetary nebula Abell 48 and its [WN] nucleus
• Flux calibration of the AAO/UKST SuperCOSMOS H-alpha Survey
• Chemical abundances and properties of the ionized gas in NGC 1705
• IC 4663: The first unambiguous [WN] Wolf-Rayet central star of a planetary nebula
• Central Stars of Galactic Planetary Nebulae II New OB-type and emission-line stars
• Observations and three-dimensional photoionization modelling of the Wolf-Rayet planetary nebula Abell 48
• The Kinematics of the Permitted C II $\lambda$ 6578 Line in a Large Sample of Planetary Nebulae
• Spectroscopy of southern Galactic disk planetary nebulae. Notes on chemical composition and emission-line stars
• New Candidate Planetary Nebulae in Galactic Globular Clusters from the VVV Survey
• Morpho-kinematic properties of Wolf-Rayet planetary nebulae
• Physical and chemical properties of Wolf-Rayet planetary nebulae
• Discovery of a Rare Late-Type, Low-Mass Wolf-Rayet Star in the LMC
• The common envelope origins of the fast jet in the planetary nebula M 3-38
• DT Serpentis: neither a symbiotic star nor a planetary nebula associate
• Introducing PyCross: PyCloudy Rendering Of Shape Software for pseudo 3D ionisation modelling of nebulae
• A primer on the formation and evolution of hydrogen deficient Central Stars of Planetary Nebulæ and Related Objects
• Are planetary nebulae derived from multiple evolutionary scenarios?
• 3D spatio-kinematic modeling of Abell 48, a planetary nebula around a Wolf-Rayet [WN] star
• The past, present and future of Galactic planetary nebula surveys
• [WN] central stars of planetary nebulae
• Morphologies of Wolf-Rayet Planetary Nebulae based on IFU Observations