Chemical abundances of planetary nebulae towards the direction of the galactic anticenter

Abstract

In this paper we report new observations and derive chemical abundances for a sample of 26 planetary nebulae (PN) located in the anticenter direction. Most of these nebulae are far away objects, located at galactocentric distances greater than about 8 kpc, so that they are particularly useful for the determination of the radial gradients at large distances from the galactic center. A comparison of the present results with previously determined abundances suggests that the radial abundance gradients flatten out at distances larger than about 10 kpc from the center.

10 pages, 4 encapsulated postscript figures, LaTeX, uses Astronomy and Astrophysics macro aa.cls, graphicx package, to be published in Astronomy and Astrophysics (2004), Also available at: http://www.astro.iag.usp.br/~maciel

Cited by in corpus (44)

• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• Elemental Abundance Ratios in Stars of the Outer Galactic Disk. I. Open Clusters
• Chemical Cartography with APOGEE: Large-scale Mean Metallicity Maps of the Milky Way
• Elemental Abundance Ratios in Stars of the Outer Galactic Disk. IV. A New Sample of Open Clusters
• The Origin of the Light Distribution in Spiral Galaxies
• The Galactic structure and chemical evolution traced by the population of planetary nebulae
• Chemical abundance analysis of the Open Clusters Berkeley 32, NGC 752, Hyades and Praesepe
• Abundances of Galactic Anticenter Planetary Nebulae and the Oxygen Abundance Gradient in the Galactic Disk
• Effects of radial flows on the chemical evolution of the Milky Way disk
• Galactic abundance gradients from Cepheids : On the iron abundance gradient around 10-12 kpc
• Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way
• Galactic abundance gradients from Cepheids: alpha and heavy elements in the outer disk
• A catalogue of integrated H-alpha fluxes for 1,258 Galactic planetary nebulae
• Origin and Evolution of the Abundance Gradient along the Milky Way Disk
• NGC 2579 and the carbon and oxygen abundance gradients beyond the solar circle
• On the alpha-element gradients of the Galactic thin disk using Cepheids
• Planetary Nebulae: Sources of Enlightenment
• Abundance gradients in spiral disks: is the gradient inversion at high redshift real?
• Chemical evolution of the Milky Way: constraints on the formation of the thick and thin discs
• First release of the IPHAS Catalogue of New Extended Planetary Nebulae
• Galactic planetary nebulae as probes of radial metallicity gradients and other abundance patterns
• Oxygen abundance distribution in Galactic disc
• Chemical distribution of HII regions towards the Galactic anticentre
• Evolution of N/O ratios in galaxies from cosmological hydrodynamical simulations
• The role of the Galactic bar in the chemical evolution of the Milky Way
• Chemical Evolution Models for Spiral Disks: the Milky Way, M31 and M33
• New results on the time variation of the radial abundance gradients from planetary nebulae
• Bayesian posterior classification of planetary nebulae according to the Peimbert types
• Interaction effects on galaxy pairs with Gemini/GMOS- II: Oxygen abundance gradients
• The "Principes de Asturias" nebula: a new quadrupolar planetary nebula from the IPHAS survey
• The Abundances of Light Neutron-Capture Elements in Planetary Nebulae III. The Impact of New Atomic Data on Nebular Selenium and Krypton Abundance Determinations
• An estimate of the time variation of the abundance gradient from planetary nebulae III. O, S, Ar, and Ne: A comparison of PN samples
• An estimate of the time variation of the abundance gradient from planetary nebulae II. Comparison with open clusters, cepheids and young objects
• Effects of the selection function on metallicity trends in spectroscopic surveys of the Milky Way
• Metallicity distributions of mono-age stellar populations of the Galactic disc from the LAMOST Galactic spectroscopic surveys
• Time variation of radial gradients in the galactic disk: electron temperatures and abundances
• CNO abundances and carbon isotope ratios in evolved stars of the open clusters NGC 2324, NGC 2477, and NGC 3960
• Chemical abundances in Seyfert galaxies X. Sulphur abundance estimates
• Neon, sulphur and argon abundances of planetary nebulae in the sub-solar metallicity Galactic anti-centre
• The kinematics of the nebular shells around low mass progenitors of PNe with low metallicity
• A pilot study of the radio-continuum emission from MASH planetary nebulae
• Do All Low-Mass Stars Undergo Extra Mixing Processes?
• Spatial metallicity variations of mono-temperature stellar populations revealed by early-type stars in LAMOST
• The morpho-kinematical structure and chemical abundances of the complex planetary nebula NGC 1514