We present here a study of the Hα equivalent widths of the flocculent galaxy NGC 4395 and the grand-design galaxy NGC 5457. A difference between the mean values...
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PublicationComparison of the Hα Equivalent Width of H II Regions in a Flocculent and a Grand-Design Galaxy: Possible Evidence for Initial Mass Function Variations
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PublicationComplex ionization structure and kinematics in the circumnuclear region of NGC 3227
We present bidimensional spectroscopy of the circumnuclear region of the Seyfert galaxy NGC 3227. The physical and kinematical characteristics of the two...
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PublicationDensity biases and temperature relations for DESIRED H II regions
We present a first study based on the analysis of the DEep Spectra of Ionized REgions Data base (DESIRED). This is a compilation of 190 high signal-to-noise...
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PublicationDensity Bounding in the H II Regions of Galactic Disks: Evidence and Consequences
We present four lines of evidence leading to the conclusion that a notable fraction of the ionizing photon emission from the stars within H II regions in the...
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PublicationDensity studies of giant extragalactic H II regions
The variation of the electron density with position in a selected group of bright giant extragalactic H II regions has been studied using long slit...
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PublicationDensity studies on giant extragalactic H II regions
We report the results of a systematic study on the spatial variation of the electron density in a selected group of bright giant H II complexes in the galaxies...
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PublicationDensity wave triggered star formation in grand design spirals
In normal spiral galaxies the arms are the main sites for star formation. This is the cause of their optical contrast compared with the rest of the disc. The...
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PublicationDensity waves and star formation in grand-design spirals
Context. H II regions in the arms of spiral galaxies are indicators of recent star-forming processes. They may have been caused by the passage of the density...
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PublicationDetailed spectrophotometric study of the giant H II region NGC 604
Detailed spectrophotometry in the visual and near-infrared is presented for four different slit positions over the core of NGC 604. The excitation ([O II]/[O...