164 citations · 368 across the 6 of their papers we have counts for
Showing 2007Show all
2 papers · 1 filter
astro-ph2007★ 43 cited
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…
astro-ph2007★ 25 cited
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…