227 citations
- Universidade Federal do MaranhãoBR26 papers
- Universidade Federal da ParaíbaBR18 papers
- Universidade Federal do CearáBR12 papers
- Universidade Federal de Campina GrandeBR6 papers
- Universidade Federal do Espírito SantoBR6 papers
- Universidade Federal do ParáBR5 papers
- Universidade do PortoPT4 papers
- Universidade Estadual de Campinas (UNICAMP)BR4 papers
- Centro Universitário Newton PaivaBR3 papers
- Consejo Nacional de Investigaciones Científicas y TécnicasAR3 papers
- Queen Mary University of LondonGB3 papers
- Universidade do Vale do ParaíbaBR3 papers
Showing astro-ph.GAShow all
3 papers · 1 filter
astro-ph.GA2022★ 12 cited
Chemical abundance of LINER galaxies -- Metallicity calibrations based on SDSS-IV MaNGA
C. B. Oliveira, A. C. Krabbe, J. A. Hernandez-Jimenez +5
The ionizing source of Low Ionization Nuclear Emission Regions (LINERs) is uncertain. Because of this, an empirical relation to determine the chemical abundances of these objects h…
astro-ph.GA2022★ 24 cited
Chemical abundances in Seyfert galaxies -IX. Helium abundance estimates
O. L. Dors, M. Valerdi, P. Freitas-Lemes +7
For the first time, the helium abundance relative to hydrogen (He/H), which relied on direct measurements of the electron temperature, has been derived in the narrow line regions (…
astro-ph.GA2021★ 8 cited
Chemical abundances in Seyfert galaxies -- VIII. Argon abundance estimates
A. F. Monteiro, O. L. Dors
For the first time, the argon abundance relative to hydrogen abundance (Ar/H) in the narrow line region of a sample of Seyfert 2 nuclei has been derived. In view of this, optical n…