101 citations · 548 across the 23 of their papers we have counts for
4 papers · 1 filter
Morphology and kinematics of Planetary Nebulae. I.A new modeling tool
C. Morisset, R. Gruenwald, S. M. Viegas
We present a new modeling tool for planetary nebulae, based on 3D photoionization calculations. Our goal is to show that all the information provided by observations, regarding kin…
A 3D morpho-kinematic study of NGC 3132
H. Monteiro, C. Morisset, R. Gruenwald +1
We present a new modeling tool for planetary nebulae (PNe), based on 3D photoionization calculations. From models for two theoretical PNe, we show that the enhancement in the equat…
Ionization Corrections For Low-Metallicity H II Regions and the Primordial Helium Abundance
S. M. Viegas, R. Gruenwald, G. Steigman
Helium and hydrogen recombination lines observed in low-metallicity, extragalactic H II regions provide the data used to infer the primordial helium mass fraction, Y_P. The ionizat…
Lyman alpha systems within hot galactic halos
Sueli M. Viegas, Amancio C. S. Friaca, Ruth Gruenwald
A hot gas halo is predicted by chemodynamical models during the early evolution of spheroidal galaxies. Cold condensations, arising from thermal instabilities in the hot gas, are e…