Las galaxias compactas azules con sobreabundancia de nitrógeno: Una respuesta desde la espectroscopía de campo integral

E. PÉREZ-MONTERO, J.M. VÍLCHEZ, B. CEDRÉS, G.F. HÄGELE, M. MOLLÁ, R. GARCÍA- BENITO, A.I. DÍAZ, C. KEHRIG Y D. MARTÍN-GORDÓN

Madrid

Congreso; IX Reunión Científica de la Sociedad Española de Astronomía; 2010

Blue compact dwarf galaxies (BCDs) take up the low end of the distribution of metallicityand nitrogen-to-oxygen (N/O) ratio as derived using collisional emission lines in ionizedgaseous nebulae. This chemical status is well explained by chemical evolution models. Nevertheless,there is a subsample of BCDs with large values of N/O which cannot be explainedby these models. In this contribution we present Potsdam Multi Aperture Spectrograph(PMAS) integral field spectroscopy (IFS) of a sample of three of these objects. The statisticalanalysis of the abundances reveals their homogeneity at kpc scales. This preserves WRstars to be the cause of the ISM pollution.