Astrophysical signatures of light dark matter

Not so dark matter

Reality

The 511 keV line

Gamma rays

Heat from cold dark matter?

Conclusions



  • Emission mechanisms
    • Direct annihilation
    • Final state radiation
    • In-flight annihilation
    • Any suggestion?

  • Uncertainties
    • Theory
    • Observations

  • Result
    • m < 20 - 50 MeV

Yago Ascasibar (Astrophysikalisches Institut Potsdam)
XLI Rencontres de Moriond (La Thuile, 24 March 2006)