Blue compact dwarf galaxies with nitrogen overabundance: a view from integral field spectroscopy

Pérez-Montero, E.; Vílchez, J. M.; Cedrés, B.; Hägele, G. F.; Mollá, M.; García-Benito, R.; Díaz, A. I.; Kehrig, C.; Martín-Gordón, D.
Referencia bibliográfica

Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held in Madrid, September 13 - 17, 2010, Eds.: M. R. Zapatero Osorio, J. Gorgas, J. Maíz Apellániz, J. R. Pardo, and A. Gil de Paz., p. 395-395

Fecha de publicación:
11
2011
Número de autores
9
Número de autores del IAC
0
Número de citas
0
Número de citas referidas
0
Descripción
Blue compact dwarf galaxies (BCDs) take up the low end of the distribution of metallicity and nitrogen-to-oxygen (N/O) ratio as derived using collisional emission lines in ionized gaseous 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 explained by 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 statistical analysis of the abundances reveals their homogeneity at kpc scales. This preserves WR stars to be the cause of the ISM pollution.