Dr
Anita Reimer
(Institut für Theoretische Physik, Universität Innsbruck, Austria)
12/11/2010, 09:30
Cosmic infrared background
Invited talk
The Fermi Large Area Telescope is scanning the sky for gamma-rays in the range ~20 MeV to over 300 GeV thereby revealing a wealth of high energy sources. Gamma rays may interact with low-energy photons from the Extragalactic Background Light (EBL) through photon-photon pair production if above the energy threshold. This results in redshift- and energy-dependent attenuation features in...
Mr
Daniel Mazin
(IFAE, Barcelona)
12/11/2010, 10:00
Cosmic infrared background
Invited talk
Very high energy (VHE, E > 30 GeV) gamma-rays are absorbed via interaction with low-energy photons from the extragalactic background light (EBL) if the involved photon energies are above the threshold for electron-positron pair creation. The VHE gamma-ray absorption, which is energy dependent and increases strongly with redshift, distorts the VHE energy spectra observed from distant objects....
Dr
Rudy Gilmore
(SISSA)
12/11/2010, 10:30
Cosmic infrared background
Contributed talk
The UV-optical photon background is closely related to the cosmological star formation history. I will present recent estimates of this background based on semi-analytic models of galaxy formation and evolution. Observations of extragalactic gamma-ray sources provide a test of UV and IR background fields, through attenuation of gamma rays due to photon-photon pair-production interactions. ...
