68 citations · 187 across the 10 of their papers we have counts for
10 papers
The case of NGC 6302: The impact of shocks in the derivation of Nitrogen abundances
P. J. A. Lago, R. D. D. Costa, M. Faúndez-Abans +1
High nitrogen abundance is characteristic of Type I planetary nebulae as well as their highly filamentary structure. In the present work we test the hypothesis of shocks as a relev…
The population of planetary nebulae near the Galactic centre: chemical abundances
O. Cavichia, R. D. D. Costa, W. J. Maciel +1
Planetary nebulae (PNe) constitute an important tool to study the chemical evolution of the Milky Way and other galaxies, probing the nucleosynthesis processes, abundance gradients…
Chemical abundances of photoionized nebulae in the Local Group
W. J. Maciel, R. D. D. Costa, O. Cavichia
Photoionized nebulae comprise basically HII regions and planetary nebulae, and their abundances give important clues on the nucleosynthesis and chemical evolution of their host gal…
The evolution of the radial gradient of Oxygen abundance in spiral galaxies
M. Mollá, A. I. Díaz, Y. Ascasibar +4
The aim of this work is to present our new series of chemical evolution models computed for spiral and low mass galaxies of different total masses and star formation efficiencies.…
The role of the Galactic bar in the chemical evolution of the Milky Way
O. Cavichia, M. Mollá, R. D. D. Costa +1
In the absence of an interaction, central bars might be the most effective mechanism for radial motions of gas in barred spiral galaxies, which represent two-thirds of disc galaxie…
Planetary nebulae in the inner Milky Way: new abundances
O. Cavichia, R. D. D. Costa, W. J. Maciel
The study of planetary nebulae in the inner-disk and bulge gives important information on the chemical abundances of elements such as He, N, O, Ar, Ne, and on the evolution of thes…