A New Way to Measure How Much Light Has Been Produced Since the Universe was Born

Authors
Georganopoulos, M.; Sambruna, R. M.; Kazanas, D.; Davis, D. S.; Cillis, Analia Nilda; Cheung, C.C.; Perlman, E. S.; Blundell, K. M.
Publication Year
2010
Language
English
Format
article
Status
Published version
Description
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.
Fil: Georganopoulos, M.. University of Maryland; Estados Unidos
Fil: Sambruna, R. M.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Fil: Kazanas, D.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Fil: Davis, D. S.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Fil: Cillis, Analia Nilda. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Cheung, C.C.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Fil: Perlman, E. S.. University of Florida; Estados Unidos
Fil: Blundell, K. M.. University of Oxford; Reino Unido
Subject
Extragalactic background light
Fornax A
Astronomía
Ciencias Físicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/20437