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Centro de Astrofísica da Universidade do Porto

Extreme CII Flux Ratios in Type 2 Quasars at z∼2

A. Humphrey, L. Binette

Abstract
We discuss the failure of canonical AGN photoionization models to explain the CII lambda1335 A to CII]lambda2326 A flux ratio in the extended narrow line regions of type 2 radio loud quasars at z∼2.5. We propose kappa-distributed electron energies as a natural solution. Low gas metallicity, shock ionization or continuum fluorescence provide plausible, but less natural, solutions.

Massive Young Star Clusters Near and Far: From the Milky Way to Reionization
(Eds.) Y. D. Mayya, D. Rosa González, E. Terlevich

INAOE & AMC
Page 219
2014

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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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