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Antoranz Canales, Pedro and Bonnefoy, Simon Francois Albert and Barrio Uña, Juan Abel and Contreras González, José Luis and Fonseca González, Mª Victoria and López Moya, Marcos and Miranda Pantoja, José Miguel and Satalecka, Konstanzja and Scapin, Valeria (2014) Optimized dark matter searches in deep observations of Segue 1 with MAGIC. Journal of Cosmology and Astroparticle Physics (2). ISSN 1475-7516
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Official URL: http://dx.doi.org/10.1088/1475-7516/2014/02/008
Abstract
We present the results of stereoscopic observations of the satellite galaxy Segue 1 with the MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours of good-quality data, this is the deepest observational campaign on any dwarf galaxy performed so far in the very high energy range of the electromagnetic spectrum. We search this large data sample for signals of dark matter particles in the mass range between 100 GeV and 20 TeV. For this we use the full likelihood analysis method, which provides optimal sensitivity to characteristic gamma-ray spectral features, like those expected from dark matter annihilation or decay. In particular, we focus our search on gamma-rays produced from different final state Standard Model particles, annihilation with internal bremsstrahlung, monochromatic lines and box-shaped signals. Our results represent the most stringent constraints to the annihilation cross-section or decay lifetime obtained from observations of satellite galaxies, for masses above few hundred GeV. In particular, our strongest limit (95% confidence level) corresponds to a similar to 500 GeV dark matter particle annihilating into tau(+)tau(-), and is of order <sigma(ann)v > similar or equal to 1.2x10(-24) cm(3) s(-1) - a factor similar to 40 above the <sigma(ann)v > similar or equal to thermal value.
Item Type: | Article |
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Additional Information: | We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The support of the German BMBF and MPG, the Italian INFN, the Swiss National Fund SNF, and the Spanish MICINN is gratefully acknowledged. This work was also supported by the |
Uncontrolled Keywords: | Gamma-Ray Emission, Galaxy, Constraints, Limits, Hess, Telescope, Signal, Fermi, Mass. |
Subjects: | Sciences > Physics > Electricity Sciences > Physics > Electronics Sciences > Physics > Nuclear physics |
ID Code: | 25302 |
Deposited On: | 09 May 2014 09:48 |
Last Modified: | 10 Dec 2018 14:58 |
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