Cuando la envoltura de una estrella en la rama asintontica de gigantes (RAG) es eyectada e inonizada por el nucleo estelar se produce la formacion de las nebulosas planetarias (NPs). La NPs representan un entorno inigualable para el estudio de procesos fisicos fundamentales como la evolucion estelar y la evolucion quimica del medio interestelar (MI

Ionized gas and stellar kinematical parameters have been measured along the major axis of 20 nearby disc galaxies. We discuss the properties of each sample galaxy, distinguishing between those characterized by regular or peculiar kinematics. In early-type disc galaxies, ionized gas tends to rotate faster than stars and to have a lower velocity

Narrowband imaging in the G band is commonly used to trace the small magnetic field concentrations of the Sun, although the mechanism that makes them bright has remained unclear. We carry out LTE syntheses of the G band in an assorted set of semiempirical model magnetic concentrations. The syntheses include all CH lines as well as the main atomic

The Universidad Complutense de Madrid Survey (UCM Survey) has been carried out the last years with the aim of looking for Hα emission-line galaxies. ISO observed some of the UCM galaxies with different instruments but a very high percentage of these star-forming galaxies were observed in ISOPHOT Serendipity Mode. The objective is to get 175 micron

We propose to measure the expansion parallax of the nebulae around the binary symbiotic Miras He 2-104 {the Southern Crab} and He 2-147 by means of high resolution WFPC2/F658N images to be taken at two different epochs. Given the large outward velocities of these nebulae inferred from ground-based spectroscopy, their apparent expansion can be

We present deep optical and near infrared imaging over half square degree of sky in the centres of the ELAIS regions N1 and N2 and coincident with deep XMM/Chandra observations. The data have been obtained with the Wide Field Camera (WFC) and the Cambridge InfraRed Survey Instrument (CIRSI) both at the Isaac Newton Telescope (Observatorio del Roque