WIMP annihilation in caustics

Abstract

The continuous infall of dark matter with low velocity dispersion from all directions in a galactic halo leads to the formation of caustics which are very small scale ($\sim$parsec) high density structures. If the dark matter is made up of SUSY neutralinos, the annihilation of these particles produces a characteristic spectrum of gamma rays which in principle, could be detected. The annihilation signal at different energy bands is computed and compared with the expected gamma ray background.

12 pages, 4 figures, Minor changes - Expanded captions, added references, detection estimates given, accepted for publication in Phys. Rev. D

References in corpus (30)

• Supersymmetric Dark Matter
• Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo
• Cosmological dark matter annihilations into gamma-rays - a closer look
• An Improved RF Cavity Search for Halo Axions
• Prospects for Indirect Detection of Neutralino Dark Matter
• A High Resolution Search for Dark-Matter Axions
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• The secondary infall model of galactic halo formation and the spectrum of cold dark matter particles on Earth
• WIMP Annual Modulation with Opposite Phase in Late-Infall Halo Models
• The velocity peaks in the cold dark matter spectrum on Earth
• The ZEPLIN-III dark matter detector: instrument design, manufacture and commissioning
• The geometry of phase mixing
• Diurnal and Annual Modulation of Cold Dark Matter Signals
• The caustic ring singularity
• Evidence for Ring Caustics in the Milky Way
• Neutralino Gamma-ray Signals from Accreting Halo Dark Matter
• The Inner Caustics of Cold Dark Matter Halos
• Searching for Supersymmetric Dark Matter - The Directional Rate and the Modulation Effect Due to Caustic Rings
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• A potential WIMP signature for the caustic ring halo model
• Particle Annihilation in Cold Dark Matter Micropancakes
• Robustness of Discrete Flows and Caustics in Cold Dark Matter Cosmology
• Evidence for universal structure in galactic halos
• Evidence for Dark Matter Annihilation from Galactic Gamma Rays?
• Dark matter caustics and the enhancement of self-annihilation flux
• Gravitational Lensing by Dark Matter Caustics
• Probing dark matter caustics with weak lensing
• $\gamma$-ray flux from Dark Matter Annihilation in Galactic Caustics
• Gravitational Lensing and Structural Stability of Dark Matter Caustic Rings
• The Big Flow

Cited by in corpus (9)

• Dark Matter Candidates: A Ten-Point Test
• The fine-grained phase-space structure of Cold Dark Matter halos
• The Caustic Ring Model of the Milky Way Halo
• Updating the MACHO fraction of the Milky Way dark halo with improved mass models
• Caustics in growing Cold Dark Matter Haloes
• Does the Second Caustic Ring of Dark Matter Cause the Monoceros Ring of Stars ?
• A further look at particle annihilation in dark matter caustics
• Seen and unseen tidal caustics in the Andromeda galaxy
• Caustics, cold flows, and annual modulation