104 citations · 295 across the 11 of their papers we have counts for
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The metal abundance of circumnuclear star forming regions in early type spirals. Spectrophotometric observations
Angeles I. Diaz, Elena Terlevich, Marcelo Castellanos +1
We have obtained long-slit observations in the optical and near infrared of 12 circumnuclear HII regions (CNSFR) in the early type spiral galaxies NGC 2903, NGC 3351 and NGC 3504 w…
The metallicity of circumnuclear star forming regions
A. I. Diaz, E. Terlevich, M. Castellanos +1
We present a spectrophotometric study of circumnuclear star forming regions (CNSFR) in the early type spiral galaxies: NGC 2903, NGC 3351 and NGC 3504, all of them of over solar me…
Nebular diagnostics for young stellar populations: Photon escape versus atmosphere blanketing
Angeles I. Diaz, Marcelo Castellanos
Emission lines in ionized nebulae can provide strong and useful constraints on the properties of both ionizing and non-ionizing stellar populations in regions with star formation,…
Optical and near-IR Spectrophotometry of CNSFRs: Preliminary Results
M. Castellanos, A. I. Diaz, M. Alvarez-Alvarez +1
Preliminary results from spectrophotometric observations of Circumnuclear Star Forming Regions (CNSFRs) in the spiral galaxies NGC 2903, NGC 3351 and NGC 3504 are presented. The an…
A comprehensive study of reported high metallicity giant HII regions. II. Ionising stellar populations
Marcelo Castellanos, Angeles I. Diaz, Elena Terlevich
The ionising stellar populations of eleven HII regions in the spiral galaxies: NGC628, NGC925, NGC1232 and NGC1637, all of them reported to have solar or oversolar abundances accor…
Stellar Populations in Circumnuclear Star Forming Regions
A. I. Diaz, M. Alvarez-Alvarez, M. Castellanos
We present a study of the stellar populations and gas physical conditions in Circumnuclear Star Forming Regions (CNSFR) based on broad and narrow band photometry and spectrophotome…
Spectrophotometry of massive star forming regions with GTC
M. Castellanos, A. I. Diaz, E. Terlevich
In these latest years, the detection of Wolf-Rayet (WR) stars in Giant HII Regions (GHRs) has yielded several questions about our current understanding of massive stars evolution a…
On the large escape of ionizing radiation from GEHRs
M. Castellanos, A. I. Diaz, G. Tenorio-Tagle
A thorough analysis of well studied giant HII regions on galactic discs for which we know the ionizing stellar population, the gas metallicity and the Wolf-Rayet population, leads…
A comprehensive study of reported high metallicity giant HII regions. I. Detailed abundance analysis
Marcelo Castellanos, Angeles Diaz, Elena Terlevich
We present long-slit observations in the optical and near infrared of fourteen HII regions in the spiral galaxies: NGC 628, NGC 925, NGC 1232 and NGC 1637, all of them reported to…
Chemical Abundances and Ionizing Clusters of HII Regions in the LINER Galaxy NGC 4258
Angeles I. Diaz, Marcelo Castellanos, Elena Terlevich +1
We present long-slit observations in the optical and near infrared of eight HII regions in the spiral galaxy NGC 4258. Six of the observed regions are located in the SE inner spira…