Rencontres de Moriond 18.03.05 Dominik Elsässer Universität Würzburg Dominik Elsässer...

Rencontres de Moriond18.03.05

Dominik ElsässerUniversität Würzburg



Indirect Signatures of Supersymmetric Indirect Signatures of Supersymmetric Dark Matter in Gamma Ray and Neutrino Dark Matter in Gamma Ray and Neutrino

DetectorsDetectors

Dominik ElsässerKarl Mannheim

Universität Würzburg





Extragalactic Gamma Ray Background

• Sreekumar et al., 1998: (fairly) featureless power law (-2.1)

• Unresolved – blazar origin suspected• Strong et al. determination shows new

challenging feature• Multi – GeV „bump“ might be a signature of

neutralino annihilation

-> qq, ,... -> pions -> , , e, p





D. Elsässer & K. Mannheim, astro-ph/0405235

Extragalactic Gamma Ray Background

>1000 TeV-sources;not found by IACTs!





Best-fit values for the neutralino properties,extracted from the EGB

pMSSM scan (DarkSusy)





Extragalactic Neutrino Background





M 87 / Virgo Cluster

C=40

C=335





INTEGRAL:~100 point sources





Galactic Center Neutralino AnnihilationHow would the source look?

Radial profileof signal strength

X – Ray image (Chandra)





Structure Formation• ART Code (A. Klypin et al.)

• 3 £ 1014 solar masses; 9 million particles („Virgo Cluster“)

• (sub)structure down to 3 £ 107 solar masses

D. Elsaesser, S. Gottloeber, A. Khalathyan and M. Steinmetz

s 2DM ds





Conclusions

• Spectral shape of the EGB might well be the long – sought first signature of supersymmetric Dark Matter

• Interesting signatures also possible from neutrino, antiproton and positron channels

• MAGIC-II: AGN counts, M 87 < 100GeV

H.E.S.S.-II: Galactic Center < 100GeV

GLAST: Galactic halo & EGB

Rencontres de Moriond 18.03.05 Dominik Elsässer Universität Würzburg Dominik Elsässer...

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