101 citations · 548 across the 23 of their papers we have counts for
15 papers · 1 filter
Outflows of very ionized gas in the center of Seyfert galaxies: kinematics and physical conditions
Alberto Rodriguez-Ardila, M. A. Prieto, S. Viegas +1
Mid-resolution spectra are used to deduce the size and kinematics of the coronal gas in a sample of Seyfert galaxies by means of observations of the [FeXI], [FeX], [FeVII], [SiVI]…
Slit Observations and Empirical Calculations for HII Regions
I. F. Fernandes, R. Gruenwald, S. M. Viegas
When analysing HII regions, a possible source of systematic error on empirically derived physical quantities is the limited size of the slit used for the observations. A grid of ph…
3-D Photoionization Structure and Distances of Planetary Nebulae II. Menzel 1
Hektor Monteiro, Hugo E. Schwarz, Ruth Gruenwald +2
We present the results of a spatio-kinematic study of the planetary nebula Menzel 1 using spectro-photometric mapping and a 3-D photoionization code. We create several 2-D emission…
3-D Photoionization Structure and Distances of Planetary Nebulae I. NGC6369
Hektor Monteiro, Hugo E. Schwarz, Ruth Gruenwald +1
We present the results of mapping the planetary nebula NGC6369 using multiple long slit spectra taken with the CTIO 1.5m telescope. We create two dimensional emission line images f…
Molecular Hydrogen in the Ionized Region of Planetary Nebulae
I. Aleman, R. Gruenwald
This paper presents an analysis of the concentration of the hydrogen molecule inside the ionized region of planetary nebulae. The equations corresponding to the ionization and chem…
UV Continuum, Physical Conditions and Filling Factor in Active Galactic Nuclei
Lucimara P. Martins, Sueli M. Viegas, Ruth Gruenwald
The narrow line region of active galaxies is formed by gas clouds surrounded by a diluted gas. Standard one-dimensional photoionization models are usually used to model this region…