164 citations · 368 across the 6 of their papers we have counts for
6 papers
The ionization mechanism of NGC 185: how to fake a Seyfert galaxy?
Lucimara Martins, Gustavo Lanfranchi, Denise R. Goncalves +3
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…
Deep spectroscopy of the emission-line populations in NGC185
Denise R. Goncalves, Laura Magrini, Lucimara P. Martins +2
Dwarf galaxies are crucial to understand the formation and evolution of galaxies, since they constitute the most abundant galaxy population. Abundance ratios and their variations d…
Bayesian posterior classification of planetary nebulae according to the Peimbert types
C. Quireza, H. J. Rocha-Pinto, W. J. Maciel
In this paper we present a re-analysis of the criteria used to characterize the Peimbert classes I, IIa, IIb, III and IV, through a statistical study of a large sample of planetary…
Time variation of radial gradients in the galactic disk: electron temperatures and abundances
W. J. Maciel, C. Quireza, R. D. D. Costa
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 p…
The Electron Temperature Gradient in the Galactic Disk
C. Quireza, R. T. Rood, T. M. Bania +2
We derive the electron temperature gradient in the Galactic disk using a sample of HII regions that spans Galactocentric distances 0--17 kpc. The electron temperature was calculate…
Radio Recombination Lines in Galactic HII Regions
Cintia Quireza, Robert T. Rood, Dana S. Balser +1
We report radio recombination line (RRL) and continuum observations of a sample of 106 Galactic HII regions made with the NRAO 140 Foot radio telescope in Green Bank, WV. We believ…