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Communication Dans Un Congrès Année : 2021

Classification of targets for gamma-ray dark matter searches with velocity-dependent annihilation and substructure boost

Résumé

Indirect searches with gamma rays set strong constraints on the properties of self-annihilating dark matter particle candidates. Observations of dwarf galaxies and galaxy clusters are especially interesting. Here we revisit the calculation of the annihilation flux by considering a velocity-dependent cross-section (Sommerfeld enhanced, for both $s$-wave and $p$-wave) and the boost factor due to dark matter substructure. We show that the combination of these two effects can lead to dramatic enhancements of the gamma-ray flux, and possibly modify the hierarchy between the brightest targets in the sky.

Dates et versions

hal-03373327 , version 1 (11-10-2021)

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Citer

Thomas Lacroix, Gaétan Facchinetti, Judit Pérez-Romero, Martin Stref, Julien Lavalle, et al.. Classification of targets for gamma-ray dark matter searches with velocity-dependent annihilation and substructure boost. 37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.571, ⟨10.22323/1.395.0571⟩. ⟨hal-03373327⟩
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