5 papers
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…
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…