# Neutralino Gamma-ray Signals from Accreting Halo Dark Matter

**Authors:** Lars Bergstrom, Joakim Edsjo, Christofer Gunnarsson  
**arXiv:** [astro-ph/0012346](https://arxiv.org/abs/astro-ph/0012346)  
**Date:** 2000-12-15  
**Summary page:** https://www.summarizepaper.com/en/arxiv-id/astro-ph--0012346v1/

## Key points

- Authors Lars Bergstrom, Joakim Edsjo, and Christofer Gunnarsson study particle cold dark matter modeling in the context of spatial inhomogeneities on sub-galactic scales.
- Density enhancements observed in high-resolution N-body simulations and analytic models are significant for structure formation implications.
- Gamma-ray flux from neutralino annihilation in regions with heightened density in Milky Way halo simulation shows strong signals.
- Strong gamma-ray signals offer insights into ruling out regions of supersymmetric parameter space and potential for further investigation through experiments like GLAST gamma-ray satellite.
- Dark matter distribution is crucial for understanding cosmic phenomena and galactic structures.
- Analysis reveals strong signals from regions with heightened density, providing avenues for exploration.
- Sikivie's model introduces axion miniclusters, but analysis shows faint gamma-ray signals that are challenging to detect reliably.
- The intricate nature of dark matter distribution within galactic structures underscores the need for comprehensive approaches to understanding its properties.

## Summary

In their study, authors Lars Bergstrom, Joakim Edsjo, and Christofer Gunnarsson delve into the complexities of modeling particle cold dark matter within the context of spatial inhomogeneities on sub-galactic scales. They highlight the significance of density enhancements observed in high-resolution N-body simulations and analytic models, particularly focusing on the implications for structure formation. By utilizing data from a recent N-body simulation of the Milky Way halo, the researchers explore the gamma-ray flux generated by neutralino annihilation in regions with heightened density. Their findings reveal compelling evidence of strong gamma-ray signals resulting from the clumpiness present across various scales in the simulation. This phenomenon not only offers insights into ruling out certain regions of the supersymmetric parameter space but also presents opportunities for further investigation through upcoming experiments like the GLAST gamma-ray satellite. distribution is a crucial factor in understanding cosmic phenomena and its impact on galactic structures. The study contributes valuable insights into ongoing efforts to unravel these mysteries and sheds light on its properties through comprehensive approaches such as  and 

One significant aspect highlighted by Bergstrom et al. is how  can provide valuable information about dark matter distribution. The researchers' analysis reveals strong signals from regions with heightened density, offering potential avenues for further exploration. Another model proposed by Sikivie introduces , continuous regions of enhanced density within dark matter halos. However, analysis shows that these rings generally produce faint gamma-ray signals that are difficult to detect reliably. This discrepancy underscores the intricate nature of dark matter distribution within galactic structures and emphasizes the need for comprehensive approaches to understanding its properties. The study by Bergstrom et al. contributes valuable insights into ongoing efforts to unravel the mysteries surrounding  and its impact on cosmic phenomena.