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The Electron Temperature Gradient in the Galactic Disk

We derive the electron temperature gradient in the Galactic disk, using a sample of H II regions that spans Galactocentric distances of 0-17 kpc. The electron temperature was calculated using…
IOP Publishing (opens in a new tab)

Radio Recombination Lines in Galactic H II Regions

We report radio recombination line (RRL) and continuum observations of a sample of 106 Galactic H II regions made with the NRAO 140 Foot (43 m) radio telescope in Green Bank, West Virginia. We…
IOP Publishing (opens in a new tab)

Bayesian posterior classification of planetary nebulae according to the Peimbert types

Context. Galactic planetary nebulae are observed with a wide variety of kinematic properties, spatial distribution, chemical composition and morphologies, comprising members of the dominant stellar…
arXiv (opens in a new tab)

A critical test of empirical mass loss formulas applied to individual giants and supergiants

Editorial Dear Colleagues, It is our pleasure to present you the 118 issue of the AGB Newsletter. A large number of contributions present new work on elemental abundances, in particular in metal-poor…

The ionization mechanism of NGC 185: how to fake a Seyfert galaxy?*

NGC 185 is a dwarf spheroidal satellite of the Andromeda galaxy. From mid-1990s onwards it was revealed that dwarf spheroidals often display a varied and in some cases complex star formation history.…
arXiv (opens in a new tab)

Deep spectroscopy of the emission-line populations in NGC 185

Because dwarf galaxies are the most abundant type of galaxy, they are crucial for our understanding of the formation and evolution of galaxies. Abundance ratios and their variations as a result of…
arXiv (opens in a new tab)

Time variation of radial gradients in the Galactic disk: electron temperatures and abundances

Aims. We investigate the electron temperature gradient in the galactic disk as measured by young HII regions on the basis of radio recombination lines and the corresponding gradient in planetary…
arXiv (opens in a new tab)

ABUNDANCE GRADIENTS IN THE OUTER GALACTIC DISK FROM PLANETARY NEBULAE

Radial abundance gradients of the element ratios O/H, Ne/H, S/H, and Ar/H are determined on the basis of a sample of disk planetary nebulae. The behaviour of the gradi- ents at large distances from…

VizieR Online Data Catalog: Abundance gradients in planetary nebulae (Maciel+, 1999)

The Abundance Gradient in Galactic H II Regions

We derive the electron temperature gradient in the Galactic disk using a sample of H ii regions that spans Galactocentric distances 0–17 kpc. The electron temperature was calculated using high…
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