Planetary nebulae in the direction of the Galactic bulge: On nebulae with emission-line central stars

Abstract

We present a homogeneous set of spectroscopic measurements secured with 4-meter class telescopes for a sample of 90 planetary nebulae (PNe) located in the direction of the Galactic bulge. We derive their plasma parameters and chemical abundances. For half of the objects this is done for the first time. We discuss the accuracy of these data and compare it with other recently published samples. We analyze various properties of PNe with emission-line central stars in the Galactic bulge. Investigating the spectra we found that 7 of those PNe are ionized by Wolf-Rayet ([WR]) type stars of the very late (VL) spectral class [WC 11] and 8 by weak emission-line (WEL) stars. From the analysis we conclude that the PN central stars of WEL, VL and remaining [WR] types form three, evolutionary unconnected forms of enhanced mass-loss among central stars of PNe. [WR] PNe seem to be intrinsically brighter than other PNe. Overall, we find no statistically significant evidence that the chemical composition of PNe with emission-line central stars is different from that of the remaining Galactic bulge PNe.

19 pages, 23 figures, 16 pages of online material, A&A in press

References in corpus (9)

• A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS Point Source Catalogue
• Elemental abundances of Galactic bulge planetary nebulae from optical recombination lines
• He~I Emission in the Orion Nebula and Implications for Primordial Helium Abundance
• The Planetary Nebula population of the Sagittarius Dwarf Spheroidal Galaxy
• Chemical compositions and plasma parameters of planetary nebulae with Wolf-Rayet and wels type central stars
• Planetary nebulae with emission-line central stars
• Abundances in the Galactic bulge: results from planetary nebulae and giant stars
• New detections of H2O masers in planetary nebulae and post-AGB stars using the Robledo-70m antenna
• Optical recombination lines as probes of conditions in planetary nebulae

Cited by in corpus (40)

• Ionization Correction Factors for Planetary Nebulae: I- Using optical spectra
• OGLE-2002-BLG-360: from a gravitational microlensing candidate to an overlooked red transient
• A catalogue of integrated H-alpha fluxes for 1,258 Galactic planetary nebulae
• Oxygen enrichment in carbon-rich planetary nebulae
• Central Stars of Planetary Nebulae: New spectral classifications and catalogue
• Symbiotic stars and other Halpha emission line stars towards the Galactic Bulge
• Catalogue of central stars of planetary nebulae: Expanded edition
• Accelerated post-AGB evolution, initial-final mass relations, and the star-formation history of the Galactic bulge
• Analysis of chemical abundances in planetary nebulae with [WC] central stars. I. Line intensities and physical conditions
• Low-ionization structures in planetary nebulae - I: physical, kinematic and excitation properties
• Planetary nebulae in M33: probes of AGB nucleosynthesis and ISM abundances
• The detection of C60 in the well-characterized planetary nebula M1-11
• Identification of new Galactic symbiotic stars with SALT. I. Initial discoveries and other emission line objects
• Newly Discovered Wolf-Rayet and Weak Emission-Line Central Stars of Planetary Nebulae
• Metal-Rich PNe in the Outer Reaches of M31
• Chemical abundances in Galactic planetary nebulae with Spitzer spectra
• The Abundances of Light Neutron-Capture Elements in Planetary Nebulae III. The Impact of New Atomic Data on Nebular Selenium and Krypton Abundance Determinations
• The planetary nebula IPHASXJ211420.0+434136 (Ou5): insights into common-envelope dynamical and chemical evolution
• Distinguishing between symbiotic stars and planetary nebulae
• IC 4663: The first unambiguous [WN] Wolf-Rayet central star of a planetary nebula
• Evidence for a [WR] or WEL-type binary nucleus in the bipolar planetary nebula Vy 1-2
• Central Stars of Galactic Planetary Nebulae II New OB-type and emission-line stars
• Improved spectral descriptions of planetary nebulae central stars
• Planetary Nebulae towards the Galactic bulge. I. [OIII] fluxes
• The Kinematics of the Permitted C II $\lambda$ 6578 Line in a Large Sample of Planetary Nebulae
• 3D pyCloudy modelling of bipolar planetary nebulae: evidence for fast fading of the lobes
• The impact of spectra quality on nebular abundances
• New groups of planetary nebulae with peculiar dust chemistry towards the Galactic bulge
• Spectroscopy of southern Galactic disk planetary nebulae. Notes on chemical composition and emission-line stars
• Morpho-kinematic properties of Wolf-Rayet planetary nebulae
• Evolution of the central stars of young planetary nebulae
• Zinc abundances of planetary nebulae
• Dust Properties in the Galactic Bulge
• Towards an improvement in the spectral description of central stars of planetary nebulae
• The population of planetary nebulae near the Galactic centre: chemical abundances
• A study of extragalactic planetary nebulae populations based on spectroscopy. I. Data compilation and first findings
• Abundances in Galactic Bulge planetary nebulae from optical, ultraviolet and infrared observations
• VLT/X-shooter Spectroscopy of a Dusty Planetary Nebula Discovered with Spitzer/IRS
• Low velocity streams inside the planetary nebula H 2-18. A 3D photoionization and kinematical reconstruction
• The kinematical behavior of Galactic PNe with [WC] central star