2010ApJ...710L..92A

Query : 2010ApJ...710L..92A

2010ApJ...710L..92A - Astrophys. J., 710, L92-L97 (2010/February-2)

Fermi-lat discovery of GeV gamma-ray emission from the young supernova remnant Cassiopeia A.

ABDO A.A., ACKERMANN M., AJELLO M., ALLAFORT A., BALDINI L., BALLET J., BARBIELLINI G., BARING M.G., BASTIERI D., BAUGHMAN B.M., BECHTOL K., BELLAZZINI R., BERENJI B., BLANDFORD R.D., BLOOM E.D., BONAMENTE E., BORGLAND A.W., BREGEON J., BREZ A., BRIGIDA M., BRUEL P., BUEHLER R., BURNETT T.H., BUSETTO G., CALIANDRO G.A., CAMERON R.A., CARAVEO P.A., CASANDJIAN J.M., CECCHI C., CELIK O., CHARLES E., CHATY S., CHEKHTMAN A., CHEUNG C.C., CHIANG J., CILLIS A.N., CIPRINI S., CLAUS R., COHEN-TANUGI J., CONRAD J., CORBEL S., DE PALMA F., DIGEL S.W., DORMODY M., DO COUTO E SILVA E., DRELL P.S., DUBOIS R., DUMORA D., EDMONDS Y., FARNIER C., FAVUZZI C., FEGAN S.J., FERRARA E.C., FOCKE W.B., FORTIN P., FRAILIS M., FUKAZAWA Y., FUNK S., FUSCO P., GARGANO F., GASPARRINI D., GEHRELS N., GERMANI S., GIAVITTO G., GIGLIETTO N., GIORDANO F., GLANZMAN T., GODFREY G., GRENIER I.A., GRONDIN M.-H., GROVE J.E., GUILLEMOT L., GUIRIEC S., HANABATA Y., HAYS E., HARDING A.K., HAYASHIDA M., HORAN D., HUGHES R.E., JACKSON M.S., JOHNSON A.S., JOHNSON T.J., JOHNSON W.N., KAMAE T., KATAGIRI H., KATAOKA J., KAWAI N., KERR M., KNODLSEDER J., KUSS M., LANDE J., LATRONICO L., LEMOINE-GOUMARD M., LONGO F., LOPARCO F., LOTT B., LOVELLETTE M.N., LUBRANO P., MAKEEV A., MAZZIOTTA M.N., MEURER C., MICHELSON P.F., MITTHUMSIRI W., MIZUNO T., MONTE C., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., MURGIA S., NAKAMORI T., NOLAN P.L., NORRIS J.P., NUSS E., OHSUGI T., OKUMURA A., OMODEI N., ORLANDO E., ORMES J.F., PANEQUE D., PANETTA J.H., PELASSA V., PEPE M., PESCE-ROLLINS M., PIRON F., POHL M., PORTER T.A., RAINO S., RANDO R., REIMER A., REIMER O., REPOSEUR T., RITZ S., RODRIGUEZ A.Y., ROMANI R.W., ROTH M., SADROZINSKI H.F.-W., SANDER A., SAZ PARKINSON P.M., SCARGLE J.D., SGRO C., SISKIND E.J., SMITH D.A., SMITH P.D., SPINELLI P., STRICKMAN M.S., SUSON D.J., TAJIMA H., TAKAHASHI T., TANAKA T., THAYER J.B., THAYER J.G., THOMPSON D.J., THORSETT S.E., TIBALDO L., TIBOLLA O., TORRES D.F., TOSTI G., TRAMACERE A., UCHIYAMA Y., USHER T.L., VAN ETTEN A., VASILEIOU V., VENTER C., VILCHEZ N., VITALE V., WAITE A.P., WANG P., WINER B.L., WOOD K.S., YAMAZAKI R., YLINEN T. and ZIEGLER M.

Abstract (from CDS):

We report on the first detection of GeV high-energy gamma-ray emission from a young supernova remnant (SNR) 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 12.2σ 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 (Cas 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 WCR=~ (1-4)x1049 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 ≥ 0.1 mG, providing new evidence of the magnetic field amplification at the forward shock and the strong field in the shocked ejecta.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - ISM: individual objects: Cassiopeia A - radiation mechanisms: non-thermal

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PSR J2229+6114 Psr 22 29 05.262 +61 14 08.48           ~ 252 2
2 PSR J2238+59 Psr 22 38 14.6 +59 04 48           ~ 14 0
3 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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