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.

Fermi Gamma-Ray Imaging of a Radio Galaxy / Abdo, Aa; Ackermann, M; Ajello, M; Atwood, Wb; Baldini, L; Ballet, J; Barbiellini, G; Bastieri, D; Baughman, Bm; Bechtol, K; Bellazzini, R; Berenji, B; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw; Bregeon, J; Brez, A; Brigida, M; Bruel, P; Burnett, Th; Buson, S; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Casandjian, Jm; Cavazzuti, E; Cecchi, C; Celik, O; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Colafrancesco, S; Cominsky, Lr; Conrad, J; Costamante, L; Cutini, S; Davis, Ds; Dermer, Cd; de Angelis, A; de Palma, F; Digel, Sw; Silva, Ede; Drell, Ps; Dubois, R; Dumora, D; Famier, C; Favuzzi, Cecilia; Fegan, Sj; Finke, J; Focke, Wb; Fortin, P; Fukazawa, Y; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Gehrels, N; Georganopoulos, M; Germani, S; Giebels, B; Giglietto, Nicola; Giordano, F; Giroletti, M; Glanzman, T; Godfrey, G; Grenier, Ia; Grove, Je; Guillemot, L; Guiriec, S; Hanabata, Y; Harding, Ak; Hayashida, M; Hays, E; Hughes, Re; Jackson, Ms; Johannesson, G; Johnson, As; Johnson, Tj; Johnson, Wn; Kamae, T; Katagiri, H; Kataoka, J; Kawai, N; Kerr, M; Knodlseder, J; Kocian, Ml; Kuss, M; Lande, J; Latronico, L; Lemoine Goumard, M; Longo, F; Loparco, F; Lott, B; Lovellette, Mn; Lubrano, P; Madejski, Gm; Makeev, A; Mazziotta, Mn; Mcconville, W; Mcenery, Je; Meurer, C; Michelson, Pf; Mitthumsiri, W; Mizuno, T; Moiseev, Aa; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Nolan, Pl; Norris, Jp; Nuss, E; Ohsugi, T; Omodei, N; Orlando, E; Ormes, Jf; Paneque, D; Parent, D; Pelassa, V; Pepe, M; Pesce Rollins, M; Piron, F; Porter, Ta; Raino, S; Rando, R; Razzano, M; Razzaque, S; Reimer, A; Reimer, O; Reposeur, T; Ritz, S; Rochester, S; Rodriguez, Ay; Romani, Rw; Roth, M; Ryde, F; Sadrozinski, Hfw; Sambruna, R; Sanchez, D; Sander, A; Parkinson, Pms; Scargle, Jd; Sgro, C; Siskind, Ej; Smith, Da; Smith, Pd; Spandre, G; Spinelli, P; Starck, Jl; Stawarz, L; Strickman, Ms; Suson, Dj; Tajima, H; Takahashi, H; Takahashi, T; Tanaka, T; Thayer, Jb; Thayer, Jg; Thompson, Dj; Tibaldo, L; Torres, Df; Tosti, G; Tramacere, A; Uchiyama, Y; Usher, Tl; Vasileiou, V; Vilchez, N; Vitale, V; Waite, Ap; Wallace, E; Wang, P; Winer, Bl; Wood, Ks; Ylinen, T; Ziegler, M; Hardcastle, Mj; Kazanas, D.. - In: SCIENCE. - ISSN 0036-8075. - STAMPA. - 328:5979(2010), pp. 725-729. [10.1126/science.1184656]

Fermi Gamma-Ray Imaging of a Radio Galaxy

FAVUZZI, Cecilia;GIGLIETTO, Nicola;
2010-01-01

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.
2010
Fermi Gamma-Ray Imaging of a Radio Galaxy / Abdo, Aa; Ackermann, M; Ajello, M; Atwood, Wb; Baldini, L; Ballet, J; Barbiellini, G; Bastieri, D; Baughman, Bm; Bechtol, K; Bellazzini, R; Berenji, B; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw; Bregeon, J; Brez, A; Brigida, M; Bruel, P; Burnett, Th; Buson, S; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Casandjian, Jm; Cavazzuti, E; Cecchi, C; Celik, O; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Colafrancesco, S; Cominsky, Lr; Conrad, J; Costamante, L; Cutini, S; Davis, Ds; Dermer, Cd; de Angelis, A; de Palma, F; Digel, Sw; Silva, Ede; Drell, Ps; Dubois, R; Dumora, D; Famier, C; Favuzzi, Cecilia; Fegan, Sj; Finke, J; Focke, Wb; Fortin, P; Fukazawa, Y; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Gehrels, N; Georganopoulos, M; Germani, S; Giebels, B; Giglietto, Nicola; Giordano, F; Giroletti, M; Glanzman, T; Godfrey, G; Grenier, Ia; Grove, Je; Guillemot, L; Guiriec, S; Hanabata, Y; Harding, Ak; Hayashida, M; Hays, E; Hughes, Re; Jackson, Ms; Johannesson, G; Johnson, As; Johnson, Tj; Johnson, Wn; Kamae, T; Katagiri, H; Kataoka, J; Kawai, N; Kerr, M; Knodlseder, J; Kocian, Ml; Kuss, M; Lande, J; Latronico, L; Lemoine Goumard, M; Longo, F; Loparco, F; Lott, B; Lovellette, Mn; Lubrano, P; Madejski, Gm; Makeev, A; Mazziotta, Mn; Mcconville, W; Mcenery, Je; Meurer, C; Michelson, Pf; Mitthumsiri, W; Mizuno, T; Moiseev, Aa; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Nolan, Pl; Norris, Jp; Nuss, E; Ohsugi, T; Omodei, N; Orlando, E; Ormes, Jf; Paneque, D; Parent, D; Pelassa, V; Pepe, M; Pesce Rollins, M; Piron, F; Porter, Ta; Raino, S; Rando, R; Razzano, M; Razzaque, S; Reimer, A; Reimer, O; Reposeur, T; Ritz, S; Rochester, S; Rodriguez, Ay; Romani, Rw; Roth, M; Ryde, F; Sadrozinski, Hfw; Sambruna, R; Sanchez, D; Sander, A; Parkinson, Pms; Scargle, Jd; Sgro, C; Siskind, Ej; Smith, Da; Smith, Pd; Spandre, G; Spinelli, P; Starck, Jl; Stawarz, L; Strickman, Ms; Suson, Dj; Tajima, H; Takahashi, H; Takahashi, T; Tanaka, T; Thayer, Jb; Thayer, Jg; Thompson, Dj; Tibaldo, L; Torres, Df; Tosti, G; Tramacere, A; Uchiyama, Y; Usher, Tl; Vasileiou, V; Vilchez, N; Vitale, V; Waite, Ap; Wallace, E; Wang, P; Winer, Bl; Wood, Ks; Ylinen, T; Ziegler, M; Hardcastle, Mj; Kazanas, D.. - In: SCIENCE. - ISSN 0036-8075. - STAMPA. - 328:5979(2010), pp. 725-729. [10.1126/science.1184656]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/9952
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