Details

Autor(en) / Beteiligte

• ACKERMANN, M
• AJELLO, M
• BONAMENTE, E
• BORGLAND, A. W
• BOTTACINI, E
• BRANDT, T. J
• BREGEON, J
• BRIGIDA, M
• BRUEL, P
• BUEHLER, R
• BUSON, S
• CALIANDRO, G. A
• ATWOOD, W. B
• CAMERON, R. A
• CARAVEO, P. A
• CASANDJIAN, J. M
• CECCHI, C
• CHARLES, E
• CHEKHTMAN, A
• CHIANG, J
• CIPRINI, S
• CLAUS, R
• COHEN-TANUGI, J
• BALDINI, L
• CONRAD, J
• CUOCO, A
• CUTINI, S
• D'AMMANDO, F
• DE ANGELIS, A
• DE PALMA, F
• DERMER, C. D
• DO COUTO E SILVA, E
• DRELL, P. S
• DRLICA-WAGNER, A
• BARBIELLINI, G
• FALLETTI, L
• FAVUZZI, C
• FEGAN, S. J
• FOCKE, W. B
• FUKAZAWA, Y
• FUNK, S
• FUSCO, P
• GARGANO, F
• GASPARRINI, D
• GERMANI, S
• BASTIERI, D
• GIGLIETTO, N
• GIORDANO, F
• GIROLETTI, M
• GLANZMAN, T
• GODFREY, G
• GRENIER, I. A
• GUIRIEC, S
• GUSTAFSSON, M
• HADASCH, D
• HAYASHIDA, M
• BECHTOL, K
• BELLAZZINI, R
• BLANDFORD, R. D
• BLOOM, E. D

Titel

CONSTRAINTS ON THE GALACTIC HALO DARK MATTER FROM FERMI-LAT DIFFUSE MEASUREMENTS

Ist Teil von

• The Astrophysical journal, 2012-12, Vol.761 (2), p.1-18

Ort / Verlag

Bristol: IOP

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We have performed an analysis of the diffuse gamma-ray emission with the Fermi Large Area Telescope (LAT) in the Milky Way halo region, searching for a signal from dark matter annihilation or decay. In the absence of a robust dark matter signal, constraints are presented. We consider both gamma rays produced directly in the dark matter annihilation/decay and produced by inverse Compton scattering of the e super(+)/e super(-) produced in the annihilation/decay. Conservative limits are derived requiring that the dark matter signal does not exceed the observed diffuse gamma-ray emission. A second set of more stringent limits is derived based on modeling the foreground astrophysical diffuse emission using the GALPROP code. Uncertainties in the height of the diffusive cosmic-ray halo, the distribution of the cosmic-ray sources in the Galaxy, the index of the injection cosmic-ray electron spectrum, and the column density of the interstellar gas are taken into account using a profile likelihood formalism, while the parameters governing the cosmic-ray propagation have been derived from fits to local cosmic-ray data. The resulting limits impact the range of particle masses over which dark matter thermal production in the early universe is possible, and challenge the interpretation of the PAMELA/Fermi-LAT cosmic ray anomalies as the annihilation of dark matter.