5 papers
An old quasar in a young dark energy-dominated universe?
A. Friaca, J. S. Alcaniz, J. A. S. Lima
Dark energy is the invisible fuel that seems to drive the current acceleration of the Universe. Its presence, which is inferred from an impressive convergence of high-quality obser…
On the Detectability of the SZ Effect of Massive Young Galaxies
Daniel Rosa-Gonzalez, Roberto Terlevich, Elena Terlevich +2
The Sunyaev-Zel'dovich (SZ) effect expected to be associated with massive star-formation activity produced during the formation of the most luminous bulges of normal galaxies is di…
Clues to the nature of damped Lyman alpha systems from chemical evolution models
Gustavo A. Lanfranchi, Amancio Friaca
The evolution of the metallicity of damped Lyman alpha systems (DLAs) is investigated in order to understand the nature of these systems. The observational data on chemical abundan…
Magnetic Fields on the Dynamics of the ICM
D. R. Goncalves, A. C. S. Friaca
Could the discrepancies found in the determination of mass in clusters of galaxies, from gravitational lensing data and from X-rays observations, be consequence of the standard des…
Alfven heating in optical filaments in cooling flows
A. C. S. Friaca, D. R. Goncalves, L. C. Jafelice +2
One of the major problems concerning cooling flows is the nature of the mechanism powering the emission lines of the optical filaments seen in the inner regions of cooling flows. I…