Anti-proton and positron Cosmic Rays from Dark Matter annihilation around Intermediate Mass Black Holes

TL;DR

This paper investigates how intermediate mass black holes could significantly boost anti-proton and positron cosmic ray signals from dark matter annihilation, but with large uncertainties due to black hole properties.

Contribution

It provides a method to estimate the dark matter annihilation signals from IMBHs and quantifies the associated statistical uncertainties.

Findings

Boost factors of about 10^4 for exotic fluxes.

Large statistical uncertainties linked to IMBH properties.

Method to derive estimates of cosmic ray contributions from IMBHs.

Abstract

Intermediate Mass Black Holes (IMBHs) are candidates to seed the Supermassive Black Holes (SMBHs), and some could still wander in the Galaxy. In the context of annihilating dark matter (DM), they are expected to drive huge annihilation rates, and could therefore significantly enhance the primary cosmic rays (CRs) expected from annihilation of the DM of the Galactic halo. In this proceeding (the original paper is Brun et al. 2007), we briefly explain the method to derive estimates of such exotic contributions to the anti-proton and positron CR spectra, and the associated statistical uncertainties connected to the properties of IMBHs. We find boost factors of order $10^4$ to the exotic fluxes, but associated with very large statistical uncertainties.