Upper limit for gamma-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco

Albert, J; Aliu, E; Anderhub, H; Antoranz, P; Backes, M; Baixeras, C; Barrio, Ja; Bartko, H; Bastieri, D; Becker, Jk; Bednarek, W; Berger, K; Bigongiari, C; Biland, A; Bock, Rk; Bordas, P; Bosch Ramon, V; Bretz, T; Britvitch, I; Camara, M; Carmona, E; Chilingarian, A; Commichau, S; Contreras, Jl; Cortina, J; Costado, Mt; Curtef, V; Danielyan, V; Dazzi, F; De Angelis, Alessandro; Delgado, C; de los Reyes, R; De Lotto, Barbara; De Maria, M; De Sabata, F; Dorner, D; Doro, M; Errando, M; Fagiolini, M; Ferenc, D; Fernandez, E; Firpo, R; Fonseca, Mv; Font, L; Fuchs, M; Galante, N; Garcia Lopez RJ,; Garczarczyk, M; Gaug, M; Goebel, F; Hakobyan, D; Hayashida, M; Hengstebeck, T; Herrero, A; Hohne, D; Hose, J; Huber, S; Hsu, Cc; Jacon, P; Jogler, T; Kosyra, R; Kranich, D; Laille, A; Lindfors, E; Lombardi, S; Longo, F; Lopez, M; Lorenz, E; Majumdar, P; Maneva, G; Mankuzhiyil, N; Mannheim, K; Mariotti, M; Martinez, M; Mazin, D; Merck, C; Meucci, M; Meyer, M; Miranda, Jm; Mirzoyan, R; Mizobuchi, S; Moles, M; Moralejo, A; Nieto, D; Nilsson, K; Ninkovic, J; Ona Wilhelmi, E; Otte, N; Oya, I; Panniello, M; Paoletti, R; Paredes, Jm; Pasanen, M; Pascoli, D; Pauss, F; Pegna, R; Perez Torres MA,; Persic, M; Peruzzo, L; Piccioli, A; Prada, F; Prandini, E; Puchades, N; Raymers, A; Rhode, W; Ribo, M; Rico, J; Rissi, M; Robert, A; Rugamer, S; Saggion, A; Saito, Ty; Sanchez, A; Sanchez Conde, M; Sartori, P; Scalzotto, V; Scapin, V; Schmitt, R; Schweizer, T; Shayduk, M; Shinozaki, K; Shore, Sn; Sidro, N; Sillanpaa, A; Sobczynska, D; Spanier, F; Stamerra, A; Stark, Ls; Takalo, L; Temnikov, P; Tescaro, D; Teshima, M; Torres, Df; Turini, N; Vankov, H; Venturini, A; Vitale, V; Wagner, Rm; Wittek, W; Zandanel, F; Zanin, R; Zapatero, J.

doi:10.1086/529135

The nearby dwarf spheroidal galaxy Draco, with its high mass to light ratio, is one of the most auspicious targets for indirect dark matter (DM) searches. Annihilation of hypothetical DM particles can result in high-energy gamma-rays, e. g., from neutralino annihilation in the supersymmetric framework. A search for a possible DM signal originating from Draco was performed with the MAGIC telescope during 2007. Analysis of the data results in a flux upper limit (2 sigma) of 1.1 x 10(-11) photons cm(-2) s(-1) for photon energies above 140 GeV, assuming a pointlike source. A comparison with predictions from supersymmetric models is also given. While our results do not constrain the mSUGRA phase parameter space, a very high flux enhancement can be ruled out.

Titolo:	Upper limit for gamma-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco
Autori:	Albert J Aliu E Anderhub H Antoranz P Backes M Baixeras C Barrio JA Bartko H Bastieri D Becker JK Bednarek W Berger K Bigongiari C Biland A Bock RK Bordas P Bosch Ramon V Bretz T Britvitch I Camara M Carmona E Chilingarian A Commichau S Contreras JL Cortina J Costado MT Curtef V Danielyan V Dazzi F DE ANGELIS, Alessandro Delgado C de los Reyes R DE LOTTO, Barbara De Maria M De Sabata F Dorner D Doro M Errando M Fagiolini M Ferenc D Fernandez E Firpo R Fonseca MV Font L Fuchs M Galante N Garcia Lopez RJ Garczarczyk M Gaug M Goebel F Hakobyan D Hayashida M Hengstebeck T Herrero A Hohne D Hose J Huber S Hsu CC Jacon P Jogler T Kosyra R Kranich D Laille A Lindfors E Lombardi S Longo F Lopez M Lorenz E Majumdar P Maneva G Mankuzhiyil N Mannheim K Mariotti M Martinez M Mazin D Merck C Meucci M Meyer M Miranda JM Mirzoyan R Mizobuchi S Moles M Moralejo A Nieto D Nilsson K Ninkovic J Ona Wilhelmi E Otte N Oya I Panniello M Paoletti R Paredes JM Pasanen M Pascoli D Pauss F Pegna R Perez Torres MA Persic M Peruzzo L Piccioli A Prada F Prandini E Puchades N Raymers A Rhode W Ribo M Rico J Rissi M Robert A Rugamer S Saggion A Saito TY Sanchez A Sanchez Conde M Sartori P Scalzotto V Scapin V Schmitt R Schweizer T Shayduk M Shinozaki K Shore SN Sidro N Sillanpaa A Sobczynska D Spanier F Stamerra A Stark LS Takalo L Temnikov P Tescaro D Teshima M Torres DF Turini N Vankov H Venturini A Vitale V Wagner RM Wittek W Zandanel F Zanin R Zapatero J. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2008
Rivista:	THE ASTROPHYSICAL JOURNAL
Abstract:	The nearby dwarf spheroidal galaxy Draco, with its high mass to light ratio, is one of the most auspicious targets for indirect dark matter (DM) searches. Annihilation of hypothetical DM particles can result in high-energy gamma-rays, e. g., from neutralino annihilation in the supersymmetric framework. A search for a possible DM signal originating from Draco was performed with the MAGIC telescope during 2007. Analysis of the data results in a flux upper limit (2 sigma) of 1.1 x 10(-11) photons cm(-2) s(-1) for photon energies above 140 GeV, assuming a pointlike source. A comparison with predictions from supersymmetric models is also given. While our results do not constrain the mSUGRA phase parameter space, a very high flux enhancement can be ruled out.
Handle:	http://hdl.handle.net/11390/879299
Appare nelle tipologie:	1.1 Articolo in rivista

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