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| Paper: |
A New Way to Measure How Much Light Has Been Produced Since the Universe was Born |
| Volume: |
427, Accretion and Ejection in AGN: a Global View |
| Page: |
177 |
| Authors: |
Georganopoulos, M.; Sambruna, R. M.; Kazanas, D.; Davis, D. S.; Cillis, A. N.; Cheung, C. C.; Perlman, E. S.; Blundell, K. M. |
| Abstract: |
The extragalactic background light (EBL) that permeates the Universe in
the optical-IR is very closely connected to the galaxy/ large scale
structure formation in our Universe. Unfortunately, measuring the EBL
has been proven very difficult, for very simple reasons that I will
discuss in the first part of my talk. Luckily, we found a
parameter-free way to break the deadlock of measuring the EBL with Fermi,
NASA’s new Gamma-ray satellite, observations of the lobes of nearby radio galaxies.
Our method measures the energy density of the Cosmic Infrared
Background at the location of radio galaxies by using Fermi
Gamma-ray and multiwavelength observations of their radio lobes.
We present an application of our method for the well-studied radio
galaxy Fornax A, showing that Fermi observations will provide
us with a direct, model independent measurement of the Cosmic Infrared
Background. |
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