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. 2010 May 7;328(5979):725-9.
doi: 10.1126/science.1184656. Epub 2010 Apr 1.

Fermi gamma-ray imaging of a radio galaxy

Fermi-LAT Collaboration; A A Abdo, M Ackermann, M Ajello, W B Atwood, L Baldini, J Ballet, G Barbiellini, D Bastieri, B M Baughman, K Bechtol, R Bellazzini, B Berenji, R D Blandford, E D Bloom, E Bonamente, A W Borgland, J Bregeon, A Brez, M Brigida, P Bruel, T H Burnett, S Buson, G A Caliandro, R A Cameron, P A Caraveo, J M Casandjian, E Cavazzuti, C Cecchi, O Celik, A Chekhtman, C C Cheung, J Chiang, S Ciprini, R Claus, J Cohen-Tanugi, S Colafrancesco, L R Cominsky, J Conrad, L Costamante, S Cutini, D S Davis, C D Dermer, A de Angelis, F de Palma, S W Digel, E do Couto e Silva, P S Drell, R Dubois, D Dumora, C Farnier, C Favuzzi, S J Fegan, J Finke, W B Focke, P Fortin, Y Fukazawa, S Funk, P Fusco, F Gargano, D Gasparrini, N Gehrels, M Georganopoulos, S Germani, B Giebels, N Giglietto, F Giordano, M Giroletti, T Glanzman, G Godfrey, I A Grenier, J E Grove, L Guillemot, S Guiriec, Y Hanabata, A K Harding, M Hayashida, E Hays, R E Hughes, M S Jackson, G Jóhannesson, A S Johnson, T J Johnson, W N Johnson, T Kamae, H Katagiri, J Kataoka, N Kawai, M Kerr, J Knödlseder, M L Kocian, M Kuss, J Lande, L Latronico, M Lemoine-Goumard, F Longo, F Loparco, B Lott, M N Lovellette, P Lubrano, G M Madejski, A Makeev, M N Mazziotta, W McConville, J E McEnery, C Meurer, P F Michelson, W Mitthumsiri, T Mizuno, A A Moiseev, C Monte, M E Monzani, A Morselli, I V Moskalenko, S Murgia, P L Nolan, J P Norris, E Nuss, T Ohsugi, N Omodei, E Orlando, J F Ormes, D Paneque, D Parent, V Pelassa, M Pepe, M Pesce-Rollins, F Piron, T A Porter, S Rainò, R Rando, M Razzano, S Razzaque, A Reimer, O Reimer, T Reposeur, S Ritz, L S Rochester, A Y Rodriguez, R W Romani, M Roth, F Ryde, H F-W Sadrozinski, R Sambruna, D Sanchez, A Sander, P M Saz Parkinson, J D Scargle, C Sgrò, E J Siskind, D A Smith, P D Smith, G Spandre, P Spinelli, J-L Starck, Ł Stawarz, M S Strickman, D J Suson, H Tajima, H Takahashi, T Takahashi, T Tanaka, J B Thayer, J G Thayer, D J Thompson, L Tibaldo, D F Torres, G Tosti, A Tramacere, Y Uchiyama, T L Usher, V Vasileiou, N Vilchez, V Vitale, A P Waite, E Wallace, P Wang, B L Winer, K S Wood, T Ylinen, M Ziegler, M J Hardcastle, D Kazanas
Free article

Fermi gamma-ray imaging of a radio galaxy

Fermi-LAT Collaboration et al. Science. .
Free article

Abstract

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.

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