The ring images presented here are part of a larger William Herschel Telescope (WHT) imaging survey (1999 and 2000) conducted to characterize the nuclear and...
The study of satellite galaxies can provide information on the merging and aggregation processes which, according to the hierarchical clustering models, form...
An analysis of the IRAS data for a sample of classical (optically selected) Seyfert galaxies is presented. The IRAS fluxes at 25 micron, 60 micron, and 100...
The present volume on stellar formation discusses basic physical principles relevant to such processes, regions of recent star formation, galaxy formation and...
Massive star formation in the central regions of spiral galaxies plays an important role in the dynamical and secular evolution of their hosts. Here, we...
Star formation in the circumnuclear regions of barred galaxies
Barred galaxies frequently exhibit central starburst activity, typically concentrated in circumnuclear rings. Much of direct and circumstantial evidence speaks...
Star formation in the globules of the Trifid Nebula
We present optical and millimeter (continuum and molecular) observations of a cometary globule in the Trifid nebula showing clear signs of star formation...