2010ApJ...722.1303A

Query : 2010ApJ...722.1303A

2010ApJ...722.1303A - Astrophys. J., 722, 1303-1311 (2010/October-3)

Fermi-LAT study of gamma-ray emission in the direction of supernova remnant W49B.

ABDO A.A., ACKERMANN M., AJELLO M., BALDINI L., BALLET J., BARBIELLINI G., BASTIERI D., BECHTOL K., BELLAZZINI R., BLOOM E.D., BONAMENTE E., BORGLAND A.W., BOUVIER A., BREGEON J., BREZ A., BRIGIDA M., BRUEL P., BUEHLER R., BUSON S., CALIANDRO G.A., CAMERON R.A., CARAVEO P.A., CASANDJIAN J.M., CECCHI C., CELIK O., CHEUNG C.C., CHIANG J., CIPRINI S., CLAUS R., COHEN-TANUGI J., CONRAD J., DERMER C.D., DE PALMA F., DIGEL S.W., DO COUTO E SILVA E., DRELL P.S., DUMORA D., FAVUZZI C., FUNK S., FUSCO P., GARGANO F., GEHRELS N., GIGLIETTO N., GIORDANO F., GIROLETTI M., GLANZMAN T., GODFREY G., GRENIER I.A., GRONDIN M.-H., GROVE J.E., GUILLEMOT L., GUIRIEC S., HADASCH D., HANABATA Y., HARDING A.K., HAYASHIDA M., HAYS E., HORAN D., HUGHES R.E., JACKSON M.S., JOHANNESSON G., JOHNSON A.S., JOHNSON W.N., KAMAE T., KATAGIRI H., KATAOKA J., KATSUTA J., KNODLSEDER J., KUSS M., LANDE J., LATRONICO L., LEE S.-H., LEMOINE-GOUMARD M., LONGO F., LOPARCO F., LOVELLETTE M.N., LUBRANO P., MAKEEV A., MAZZIOTTA M.N., MIZUNO T., MONTE C., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., MURGIA S., NAUMANN-GODO M., NOLAN P.L., NORRIS J.P., NUSS E., OHSUGI T., OKUMURA A., OMODEI N., ORLANDO E., ORMES J.F., 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 H.F.-W., SANDER A., SAZ PARKINSON P.M., SGRO C., SISKIND E.J., SMITH D.A., SMITH P.D., SPINELLI P., STRICKMAN M.S., SUSON D.J., TAJIMA H., TAKAHASHI H., TAKAHASHI T., TANAKA T., TIBALDO L., TIBOLLA O., TORRES D.F., TOSTI G., TRAMACERE A., UCHIYAMA Y., USHER T.L., VANDENBROUCKE J., VASILEIOU V., VITALE V., WAITE A.P., WANG P., WINER B.L., WOOD K.S., YLINEN T. and ZIEGLER M.

Abstract (from CDS):

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 38σ 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 1.5x1036 (D/8 kpc)2 erg/s 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 π 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, Ue,p>104 eV/cm3, for either gamma-ray production mechanism.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - ISM: individual: W49B - radiation mechanisms: non-thermal

Simbad objects: 8

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Number of rows : 8
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 IC 443 SNR 06 17 00.0000000 +22 34 11.998901           ~ 1314 1
2 SNR G347.3-00.5 SNR 17 12 27 -39 41.2     12.27     ~ 761 1
3 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 1034 2
4 PSR J1907+06 Psr 19 07 54.751 +06 02 15.79           ~ 147 0
5 W 49a SFR 19 10 15.7 +09 06 05           ~ 325 2
6 W 49b SNR 19 11 09.5 +09 06 21           ~ 500 1
7 SNR G049.1-00.1 SNR 19 23 19.300 +14 09 21.00           ~ 309 0
8 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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