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Centro de Astrofísica da Universidade do Porto

The extreme properties of the "Green Pea" galaxies. New hints from GTC observations

R. O. Amorín, J. M. Vílchez, E. Pérez-Montero, P. Papaderos

Abstract
We review recent findings of a detailed spectrophotometric study based on OSIRIS-GTC observations of "Green Pea" (GP) galaxies. These compact, emission-line galaxies at redshift z~0.15-0.35 are metal-poor, low-mass objects with high star formation rates. We show how high quality GTC data allow us to: (a) derive physical properties and chemical abundances of the ionized gas with high accuracy and, (b) to place constraints on the star formation history using the combined approach of evolutionary and population spectral synthesis models. These results provide additional clues on the nature and evolutionary state of the GPs and highlight their importance as laboratories for studying galaxy evolution at late cosmic epochs.

Fourth Science Meeting with the GTC
(Eds.) C. Muñoz-Tuñón, J. M. Rodríguez-Espinosa

Revista Mexicana de Astronomía y Astrofísica
Vol. 42, Page 49
2013

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Institute of Astrophysics and Space Sciences

Institute of Astrophysics and Space Sciences (IA) is a new but long anticipated research infrastructure with a national dimension. It embodies a bold but feasible vision for the development of Astronomy, Astrophysics and Space Sciences in Portugal, taking full advantage and fully realizing the potential created by the national membership of the European Space Agency (ESA) and the European Southern Observatory (ESO). IA resulted from the merging the two most prominent research units in the field in Portugal: the Centre for Astrophysics of the University of Porto (CAUP) and the Center for Astronomy and Astrophysics of the University of Lisbon (CAAUL). It currently hosts more than two-thirds of all active researchers working in Space Sciences in Portugal, and is responsible for an even greater fraction of the national productivity in international ISI journals in the area of Space Sciences. This is the scientific area with the highest relative impact factor (1.65 times above the international average) and the field with the highest average number of citations per article for Portugal.

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