Abdo, A. A.A. A.AbdoAckermann, M.M.AckermannAjello, M.M.AjelloCavazzuti, ElisabettaElisabettaCavazzutiColafrancesco, SergioSergioColafrancescoCutini, SaraSaraCutiniGasparrini, DarioDarioGasparriniTosti, G.G.Tosti2020-09-172020-09-172010-05-01https://hdl.handle.net/20.500.13025/2023Science, Volume 328, Issue 5979, pp. 725- (2010).The Fermi Gamma-ray Space Telescope has detected the gamma-ray glow emanating from the giant radio lobes of the radio galaxy Centaurus A. The resolved gamma-ray image shows the lobes clearly separated from the central active source. In contrast to all other active galaxies detected so far in high-energy gamma-rays, the lobe flux constitutes a considerable portion (greater than one-half) of the total source emission. The gamma-ray emission from the lobes is interpreted as inverse Compton-scattered relic radiation from the cosmic microwave background, with additional contribution at higher energies from the infrared-to-optical extragalactic background light. These measurements provide gamma-ray constraints on the magnetic field and particle energy content in radio galaxy lobes, as well as a promising method to probe the cosmic relic photon fields.journal article10.1126/science.1184656http://adsabs.harvard.edu/abs/2010Sci...328..725A2010Sci...328..725A