We present results derived from Hα images of 327 local galaxies from the HaGS (Hα Galaxy Survey), where we have correlated the star formation rates with the interaction characteristics of the galaxies. We see a significant increase in the star formation rate in galaxies with close neighbors, an increase which has probably been triggered by galaxy

We present some global results of the PhD thesis research carried out by López-Sánchez (2006), in which a detailed morphological, photometric and spectroscopic analysis of a sample of 20 Wolf-Rayet (WR) galaxies was carried out. The main aims are the study of the star formation and O and WR stellar populations in these galaxies, and the role that

Starbursts are events in which hundreds of solar masses per year of gas are transformed into stars on timescales much shorter than the Hubble time. They are essential in galaxy evolution as they are responsible for the largest part of the chemically enriched material in the interstellar and intergalactic medium where the metals have been deposited

The PICARD mission is a CNES micro-satellite to be launched in 2009. Its goal is to better understand the Sun and the potential impact of its activity on earth climate by measuring simultaneously the solar total and spectral irradiance, diameter, shape and oscillations. We present the scientific objectives, instrumental requirements and data

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GHαFaS, a new Fabry-Perot system, is now available at the William Herschel Telescope (WHT). It was mounted, for the first time, at the Nasmyth focus of the 4.2-m WHT on La Palma in 2007 July. Using modern technology, with a spectral resolution of the order R˜15,000, and with a seeing-limited spatial resolution, GHαFaS will provide a new look at the