En este trabajo se analiza la emisiónde (Fe II) y (Fe III) en siete regiones H II galaácticas: M42, M43, M8, M16, M17, M20 y NGC 7635, usando para ello espectros en el rango landa landa 4200-8800 obtenidos en distintas zonas de cada objeto. Las líneas de emisión no pertenecientes a los iones del Fe se usan para determinar las condiciones físicas y

We present TAURUS Fabry-Perot velocity data in Hα emission of the disc of the grand design spiral M 100 (NGC 4321). We have studied the emission spectra of the 200 H ii regions most luminous in Hα, calibrated in luminosity using photometric Hα imaging from the literature. The emission spectra of individual H ii regions were fitted using one or more

In our search, started in February, 1994, for JHK excess fluxes among the hot subdwarf population as an indicator for the presence of binary companions, results for 72 more hot objects (=63 hot subdwarfs + 1 Horizontal Branch B star + 7 white dwarfs + 1 non-subdwarf object) observed with the Carlos Sanchez CVF IR photometer (in June and October

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Simultaneous modeling of the line and continuum emission from the nuclear region of the Circinus galaxy is presented. Composite models that include the combined effect of shocks and photoionization from the active center and from the circumnuclear star-forming region are considered. The effects of dust reradiation, bremsstrahlung from the gas, and

We show that kinematically peculiar cores may be generated in stellar spiral-spiral mergers. Kinematic segregation appears as the central bulges transport orbital angular momentum inward to the center of the remnant, while the outer parts keep the spin signature of the precursor disks. The peculiar core is composed mostly of bulge material, and its