La espectroscopía bidimensional con fibras ópticas es una técnica reciente que permite obtener simultáneamente la información espacial y espectral de un objeto extenso. Esta técnica puede ser aplicada en varios campos de la Astrofísica como, p.e., las regiones circumnucleares de galaxias. En esta Tesis analizamos los resultados obtenidos en esta

We present near-IR narrowband continuum-subtracted images in the H2 2.122 μm, and Brγ 2.166 μm emission lines for a sample of 15 bipolar planetary nebulae (PNe). H2 emission was definitely detected for most of the objects in this sample (13 of 15). The very high H2 detection rate supports the idea that bipolar PNe have important reservoirs of

We show here evidence for the necessity of an asymmetric form in modelling the profile of an acoustic mode in the power spectral density. The analysis was performed on a 805-day series of GOLF data (l=0 to 3). The assumptions used for the fits are discussed and their consequences quantified, in particular for the optimum choice of the fitting

We present gaseous and stellar kinematics for 14 gas-rich early-type galaxies. Half of the sample exhibit irregular gaseous velocity profiles; gas/star counter-rotation is visible in five galaxies. We also find five counter-rotating stellar cores, while five more galaxies display inner components kinematically decoupled from the main stellar body

We searched for planetary nebulae (PNe) in the nearby spiral galaxy M33 using the Wide Field Camera at the 2.54 m Isaac Newton Telescope of La Palma (Spain). Images in the [O iii] nebular line at lambda 5007Ä, in the Hα +[N ii] lines around 6560 Ä, and in the continuum around 5550Ä allowed us to detect a large number of emission line objects. Among

We combine Hα imaging and broad-band optical and NIR imaging over the face of the barred galaxy NGC 3359, obtained within the BARS program on the Canary Island telescopes. From the Hα image we have determined the positions, fluxes, and diameters of a total of 547 Hii regions, and computed their luminosity function, whose slope is within the range