Presentation 1 : Oral
Supersymmetric dark matter in M31: can one see neutralino annihilation with CELESTE?
A.Falvard, E.Giraud, A.Jacholkowska, K.Jedamzik, J.Lavalle,G.Moultaka, E.Nuss, F.Piron, P.Salati, M.Sapinski, R.Taillet
It is widely believed that dark matter exists within galaxies and clusters
of galaxies. Under the assumption that this dark matter is composed of
the lightest, stable supersymmetric particle, i.e. neutralinos, the
feasibility of its indirect detection via observations of a diffuse
gamma-ray signal due to neutralino annihilations within M31 is examined.
To this end, first the dark matter halo of the close spiral galaxy M31
is modeled from observations,then the resultant gamma-ray flux is
estimated within some supersymmetric model configurations.
It is concluded that under favorable conditions a neutralino
annihilation gamma-ray signal may be seen by theongoing observations
of M31 with CELESTE. (PCHE)