2026-06-29T07:40:12Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/508342024-09-06T15:40:06Zcom_20.500.14352_14col_20.500.14352_15

Upper limit for gamma-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco Antoranz Canales, Pedro Barrio Uña, Juan Abel Contreras González, José Luis Fonseca González, María Victoria López Moya, Marcos Miranda Pantoja, José Miguel Nieto Castaño, Daniel 537 539.1 Supersymmetry Parameters. Electrónica (Física) Electricidad Física nuclear 2202.03 Electricidad 2207 Física Atómica y Nuclear © The American Astronomical Society. We would like to thank the IAC for the excellent working conditionsat the Observatory de los Muchachos in La Palma. The support of the German BMBF and MPG, the Italian INFN, and the Spanish CICYT is gratefully acknowledged. This work was also supported by ETH research grant TH 34/043, and the Polish MNiI grant 1P03D01028. 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. German BMBF German MPG Italian INFN Spanish CICYT ETH Polish MNiI Depto. de Estructura de la Materia, Física Térmica y Electrónica Fac. de Ciencias Físicas TRUE pub 2023-06-20T10:37:53Z 2023-06-20T10:37:53Z 2008-05-20 journal article https://hdl.handle.net/20.500.14352/50834 0004-637X 10.1086/529135 eng TH 34/043 1P03D01028 open access application/pdf UNIV CHICAGO PRESS