| Issue |
A&A
Volume 450, Number 1, April IV 2006
|
|
|---|---|---|
| Page(s) | 1 - 8 | |
| Section | Astrophysical processes | |
| DOI | https://doi.org/10.1051/0004-6361:20054340 | |
| Published online | 03 April 2006 | |
Indirect search for dark matter in M 31 with the CELESTE experiment
1
Laboratoire de Physique Théorique et Astroparticules, CNRS-IN2P3/Université de Montpellier II, 34095 Montpellier, France e-mail: lavalle@in2p3.fr
2
Laboratoire Louis Leprince-Ringuet, CNRS-IN2P3/École Polytechnique, 91128 Palaiseau, France
3
Centre d'Etudes Nucléaires de Bordeaux-Gradignan, CNRS-IN2P3, 33175 Bordeaux, France
4
Laboratoire d'Astroparticule et Cosmologie, CNRS-IN2P3/Collège de France, 75231 Paris, France
Received:
11
October
2005
Accepted:
5
January
2006
Context.If dark matter is made of neutralinos, annihilation of such Majorana
particles should produce high energy cosmic rays, especially
in galaxy halo high density regions like galaxy centres.Aims.M 31 (Andromeda) is our nearest neighbour spiral galaxy, and both its
high mass and its low distance make it a source of interest for the
indirect search for dark matter through γ-ray detection.Methods.The ground based atmospheric Cherenkov telescope CELESTE observed M 31
from 2001 to 2003, in the mostly unexplored energy range 50-500 GeV.Results.These observations provide an upper limit on the flux above 50 GeV
around 
in the frame of
supersymmetric dark matter, and more generally on any gamma emission
from M 31.
© ESO, 2006
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