Fermi-LAT study of Gamma-ray emission in the direction of supernova remnant W49B
| Title: | Fermi-LAT study of Gamma-ray emission in the direction of supernova remnant W49B |
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| Authors: | Abdo AA; Ackermann M; Ajello M; Baldini L; Ballet J; Barbiellini G; Bastieri D; Bechtol K; Bellazzini R; Bloom ED; Bonamente E; Borgland AW; Bouvier A; Bregeon J; Brez A; Brigida M; Bruel P; Buehler R; Buson S; Caliandro GA; Cameron RA; Caraveo PA; Casandjian JM; Cecchi C; Celik O; Cheung CC; Chiang J; Ciprini S; Claus R; Cohen Tanugi J; Conrad J; Dermer CD; de Palma F; Digel SW; Silva EDE; Drell PS; Dumora D; FAVUZZI, Cecilia; Funk S; Fusco P; Gargano F; Gehrels N; GIGLIETTO, Nicola; Giordano F; Giroletti M; Glanzman T; Godfrey G; Grenier IA; Grondin MH; Grove JE; Guillemot L; Guiriec S; Hadasch D; Hanabata Y; Harding AK; Hayashida M; Hays E; Horan D; Hughes RE; Jackson MS; Johannesson G; Johnson AS; Johnson WN; Kamae T; Katagiri H; Kataoka J; Katsuta J; Knodlseder J; Kuss M; Lande J; Latronico L; Lee SH; Lemoine Goumard M; Longo F; Loparco F; Lovellette MN; Lubrano P; Makeev A; Mazziotta MN; Mizuno T; Monte C; Monzani ME; Morselli A; Moskalenko IV; Murgia S; Naumann Godo M; Nolan PL; Norris JP; Nuss E; Ohsugi T; Okumura A; Omodei N; Orlando E; Ormes JF; Pelassa V; Pepe M; Pesce Rollins M; Piron F; Raino S; Rando R; Razzano M; Reimer A; Reimer O; Reposeur T; Ripken J; Roth M; Sadrozinski HF; Sander A; Parkinson PMS; Sgro C; Siskind EJ; Smith DA; Smith PD; Spinelli P; Strickman MS; Suson DJ; Tajima H; Takahashi H; Takahashi T; Tanaka T; Tibaldo L; Tibolla O; Torres DF; Tosti G; Tramacere A; Uchiyama Y; Usher TL; Vandenbroucke J; Vasileiou V; Vitale V; Waite AP; Wang P; Winer BL; Wood KS; Ylinen T; Ziegler M. |
| Contributors: | Abdo, Aa; Ackermann, M; Ajello, M; Baldini, L; Ballet, J; Barbiellini, G; Bastieri, D; Bechtol, K; Bellazzini, R; Bloom, Ed; Bonamente, E; Borgland, Aw; Bouvier, A; Bregeon, J; Brez, A; Brigida, M; Bruel, P; Buehler, R; Buson, S; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Casandjian, Jm; Cecchi, C; Celik, O; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Conrad, J; Dermer, Cd; de Palma, F; Digel, Sw; Silva, Ede; Drell, P; Dumora, D; Favuzzi, Cecilia; Funk, S; Fusco, P; Gargano, F; Gehrels, N; Giglietto, Nicola; Giordano, F; Giroletti, M; Glanzman, T; Godfrey, G; Grenier, Ia; Grondin, Mh; Grove, Je; Guillemot, L; Guiriec, S; Hadasch, D; Hanabata, Y; Harding, Ak; Hayashida, M; Hays, E; Horan, D; Hughes, Re; Jackson, M; Johannesson, G; Johnson, A; Johnson, Wn; Kamae, T; Katagiri, H; Kataoka, J; Katsuta, J; Knodlseder, J; Kuss, M; Lande, J; Latronico, L; Lee, Sh; Lemoine Goumard, M; Longo, F; Loparco, F; Lovellette, Mn; Lubrano, P; Makeev, A; Mazziotta, Mn; Mizuno, T; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Naumann Godo, M; Nolan, Pl; Norris, Jp; Nuss, E; Ohsugi, T; Okumura, A; Omodei, N; Orlando, E; Ormes, Jf; Pelassa, V; Pepe, M; Pesce Rollins, M; Piron, F; Raino, S; Rando, R |
| Publication Year: | 2010 |
| Collection: | Politecnico di Bari: Iris POLIBA (Catalogo dei prodotti della Ricerca) |
| Subject Terms: | Acceleration of particle; ISM: individual objects (W49B); radiation mechanisms: non-thermal |
| Description: | We present an analysis of the gamma-ray data obtained with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope in the direction of SNR W49B (G43.3-0.2). A bright unresolved gamma-ray source detected at a significance of 38 sigma is found to coincide with SNR W49B. The energy spectrum in the 0.2-200 GeV range gradually steepens toward high energies. The luminosity is estimated to be 1.5 x 10(36) (D/8 kpc)(2) erg s(-1) in this energy range. There is no indication that the gamma-ray emission comes from a pulsar. Assuming that the supernova remnant (SNR) shell is the site of gamma-ray production, the observed spectrum can be explained either by the decay of neutral pi mesons produced through the proton-proton collisions or by electron bremsstrahlung. The calculated energy density of relativistic particles responsible for the LAT flux is estimated to be remarkably large, U(e,p) > 10(4) eV cm(-3), for either gamma-ray production mechanism. |
| Document Type: | article in journal/newspaper |
| File Description: | ELETTRONICO |
| Language: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000284075400026; volume:722; issue:2; firstpage:1303; lastpage:1311; numberofpages:9; journal:THE ASTROPHYSICAL JOURNAL; https://hdl.handle.net/11589/171 |
| DOI: | 10.1088/0004-637X/722/2/1303 |
| Availability: | https://hdl.handle.net/11589/171; https://doi.org/10.1088/0004-637X/722/2/1303 |
| Rights: | info:eu-repo/semantics/openAccess ; license:Tutti i diritti riservati |
| Accession Number: | edsbas.D5960F58 |
| Database: | BASE |