We have mapped the gaseous kinematics and the emission-line flux distributions and ratios
from the inner≈ 680 pc radius of the Seyfert 1 galaxy Mrk 79, using two-dimensional (2D) …

We investigate the discrepancy between oxygen abundance estimations for narrow-line
regions of active galactic nuclei (AGNs) type Seyfert 2 derived using direct estimations of the …

We use the Gemini NIFS instrument to map the H m and Brγ flux distributions in the inner
0.04–2 kpc of a sample of 36 nearby active galaxies (0.001≲ z≲ 0.056) at spatial resolutions …

We present the first results of an analysis of the properties of the molecular gas in the
nuclear regions (r≲ 300 pc) of a sample of six nearby galaxies, based on new high-spatial …

The impact of active galactic nuclei (AGNs) on star formation has implications for our
understanding of the relationships between supermassive black holes and their galaxies, as …

We study the kinematics and excitation mechanisms of H2 and [Fe ii] lines in a sample of 67
emission-line galaxies with Infrared Telescope Facility SpeX near-infrared (0.8–2.4 μm) …

We analysed the evolution of the metallicity of the gas with the redshift for a sample of AGNs
in a very wide redshift range (0< z< 4) using ultraviolet emission lines from the narrow-line …

We examine the relation between oxygen abundances in the narrow-line regions (NLRs) of
active galactic nuclei (AGNs) estimated from the optical emission lines through the strong …

The near-infrared spectra of active galactic nuclei (AGN) present emission lines of different
atomic and molecular species. The mechanisms involved in the origin of these emission …

We derive a new relation between the metallicity of Seyfert 2 active galactic nuclei (AGNs)
and the intensity of the narrow emission-lines ratio N 2 O 2= log ([N ii] λ6584/[O ii] λ3727) …