# Remnants of Galactic subhalos and their impact on indirect dark matter searches

## TL;DR

This paper reevaluates the abundance of dark matter subhalos in the Milky Way, accounting for simulation artifacts, and finds that the expected gamma-ray and cosmic-ray signals are roughly doubled, impacting indirect dark matter detection.

## Contribution

It introduces a semi-analytical method to accurately estimate subhalo abundance, correcting for over-efficient tidal disruption seen in simulations.

## Key findings

- Boost factor for gamma rays increased by ~2
- Boost factor for cosmic-ray antiprotons increased by ~2
- Revised subhalo abundance impacts dark matter search strategies

## Abstract

Dark matter subhalos, predicted in large numbers in the cold dark matter scenario, should have an impact on particle dark matter searches. Recent results show that tidal disruption of these objects in computer simulations is over-efficient due to numerical artifacts and resolution effects. Accounting for these results, we re-estimate the subhalo abundance in the Milky Way using semi-analytical techniques. In particular, we show that the boost factor for gamma rays and cosmic-ray antiprotons is increased by roughly a factor of two.