The long-standing difference in chemical abundances determined from optical recombination lines and collisionally excited lines raises questions about our...
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PublicaciónThe impact of strong recombination on temperature determination in planetary nebulae
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PublicaciónThe impact of strong recombination on temperature determination in planetary nebulae
The long-standing difference in chemical abundances determined from optical recombination lines and collisionally excited lines raises questions about our...
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PublicaciónThe Intergalactic Stellar Population from Mergers of Elliptical Galaxies with Dark Matter Halos
We present simulations of dry-merger encounters between pairs of elliptical galaxies with dark matter halos. The aim of these simulations is to study the...
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PublicaciónThe ionised and molecular mass of post-common-envelope planetary nebulae. The missing mass problem
Context. Most planetary nebulae (PNe) show beautiful, axisymmetric morphologies despite their progenitor stars being essentially spherical. Close binarity is...
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PublicaciónThe iron abundance in four planetary nebulae
We have observed the high excitation planetary nebulae NGC 7027, NGC 6543 and the low excitation planetaries Hu 2-1 and Cn 3-1 in the optical & near IR with the...
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PublicaciónThe Iron Abundance in Galactic Planetary Nebulae
We constrain the iron abundance in a sample of 33 low-ionization Galactic planetary nebulae (PNe) using [Fe III] lines and correcting for the contribution of...
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PublicaciónThe kinematic behaviour of optical recombination lines and collisionally excited lines in Galactic planetary nebulae*†
The kinematics of the plasma in 14 planetary nebulae (PNe) is analysed by measuring the expansion velocities (Vexp) of different ions as derived from their...
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PublicaciónThe kinematic structure of the unusual outflow source SH 2-71
We have undertaken high resolution spectroscopy and IR photometry of the extended planetary nebula Sh 2-71. As a consequence, we note evidence for a discoidal...
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PublicaciónThe kinematical behavior of Galactic PNe with [WC] central star
High resolution spectroscopic data of a large sample of galactic planetary nebulae with [WC] central stars ([WC]PNe) are analyzed to determine their kinematical...