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Centro de Astrofísica da Universidade do Porto
Stars, Supernovae: elements production and abundances in the ISM

Mercedes Mollá
CIEMAT-Madrid, División de Astrofísica de Partículas

Stars are born, evolve and die. Low mass stars die as planetary nebulae while the most massive stars explode as Supernovae. The Supernova Ia are the final end of a binary stellar system. All of them have an impact on the galaxy in which they are produced since the elements created in these processes by stellar nucleosynthesis are ejected to the interstellar medium (ISM). They are diluted and later incorporated into the next generation of stars. In this way the rate of star formation is directly related to the elemental abundances measured in galaxies. Observations of the emission lines of HII regions give to us the information to estimate these abundances from which, with the adequate tools, we may extract the evolutionary histories of each region

20 February 2013, 13:30

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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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