Details

Autor(en) / Beteiligte

• Ajello, M
• Baldini, L
• Ballet, J
• Baughman, B. M
• Bechtol, K
• Blandford, R. D
• Bonamente, E
• Borgland, A. W
• Bregeon, J
• Brez, A
• Brigida, M
• Buehler, R
• Burnett, T. H
• Busetto, G
• Caliandro, G. A
• Cameron, R. A
• Caraveo, P. A
• Casandjian, J. M
• Cecchi, C
• Çelik, Ö
• Chekhtman, A
• Cheung, C. C
• Cillis, A. N
• Cohen-Tanugi, J
• Conrad, J
• Corbel, S
• de Palma, F
• do Couto e Silva, E
• Dubois, R
• Dumora, D
• Favuzzi, C
• Fegan, S. J
• Ferrara, E. C
• Fortin, P
• Frailis, M
• Fukazawa, Y
• Funk, S
• Gasparrini, D
• Giglietto, N
• Glanzman, T
• Grenier, I. A
• Grondin, M.-H
• Hanabata, Y
• Harding, A. K
• Hayashida, M
• Horan, D
• Hughes, R. E
• Johnson, A. S
• Johnson, T. J
• Kamae, T
• Katagiri, H
• Kerr, M
• Kuss, M
• Latronico, L
• Lemoine-Goumard, M
• Lubrano, P
• Makeev, A
• Mazziotta, M. N
• Mitthumsiri, W
• Mizuno, T
• Morselli, A
• Murgia, S
• Nakamori, T
• Nolan, P. L
• Norris, J. P
• Okumura, A
• Omodei, N
• Pepe, M
• Piron, F
• Pohl, M
• Porter, T. A
• Rainò, S
• Reimer, A
• Reposeur, T
• Rodriguez, A. Y
• Romani, R. W
• Roth, M
• Sadrozinski, H. F.-W
• Siskind, E. J
• Spinelli, P
• Suson, D. J
• Tajima, H
• Takahashi, T
• Thayer, J. B
• Thompson, D. J
• Tibaldo, L
• Tibolla, O
• Uchiyama, Y
• Usher, T. L
• Van Etten, A
• Vasileiou, V
• Venter, C
• Vitale, V
• Waite, A. P
• Wang, P
• Winer, B. L
• Wood, K. S
• Yamazaki, R
• Ylinen, T
• Ziegler, M

Titel

Fermi-Lat Discovery of GeV Gamma-Ray Emission from the Young Supernova Remnant Cassiopeia A

Ist Teil von

• Astrophysical journal. Letters, 2010-02, Vol.710 (1), p.L92-L97

Ort / Verlag

IOP Publishing

Erscheinungsjahr

2010

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We report on the first detection of GeV high-energy gamma-ray emission from a young supernova remnant with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope. These observations reveal a source with no discernible spatial extension detected at a significance level of 12.2$\sigma$ above 500 MeV at a location that is consistent with the position of the remnant of the supernova explosion that occurred around 1680 in the Cassiopeia constellation - Cassiopeia A. The gamma-ray flux and spectral shape of the source are consistent with a scenario in which the gamma-ray emission originates from relativistic particles accelerated in the shell of this remnant. The total content of cosmic rays (electrons and protons) accelerated in Cas A can be estimated as $W_{\mathrm{CR}} \approx (1-4) \times 10^{49}$ erg thanks to the well-known density in the remnant assuming that the observed gamma-ray originates in the SNR shell(s). The magnetic field in the radio-emitting plasma can be robustly constrained as B $\gt 0.1$ mG, providing new evidence of the magnetic field amplification at the forward shock and the strong field in the shocked ejecta.