Classification of targets for gamma-ray dark matter searches with velocity-dependent annihilation and substructure boost
| Autor: | Julien Lavalle, Gaétan Facchinetti, Martin Stref, Thomas Lacroix, David Maurin, Miguel A. Sánchez-Conde, J. Pérez-Romero |
|---|---|
| Přispěvatelé: | Laboratoire Univers et Particules de Montpellier (LUPM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Annihilation Astrophysics::High Energy Astrophysical Phenomena Dark matter Gamma ray dark matter: annihilation Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics hierarchy gamma ray: emission dark matter: halo Substructure galaxy: cluster gamma ray: flux structure velocity dependence [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics::Galaxy Astrophysics |
| Zdroj: | PoS 37th International Cosmic Ray Conference 37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.571, ⟨10.22323/1.395.0571⟩ |
| DOI: | 10.22323/1.395.0571⟩ |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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