A Fisher-matrix forecast shows that the proposed deci-Hz space detector GWSat would constrain dark matter spike density and slope around intermediate-mass ratio inspirals to sub-percent accuracy, while third-generation ground detectors add modest gains for total masses below 400 solar masses.
A New Signature of Dark Matter Annihilations: Gamma-Rays from Intermediate-Mass Black Holes
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We study the prospects for detecting gamma-rays from Dark Matter (DM) annihilations in enhancements of the DM density (mini-spikes) around intermediate-mass black holes with masses in the range $10^2 \lsim M / \msun \lsim 10^6$. Focusing on two different IMBH formation scenarios, we show that, for typical values of mass and cross section of common DM candidates, mini-spikes, produced by the adiabatic growth of DM around pregalactic IMBHs, would be bright sources of gamma-rays, which could be easily detected with large field-of-view gamma-ray experiments such as GLAST, and further studied with smaller field-of-view, larger-area experiments like Air Cherenkov Telescopes CANGAROO, HESS, MAGIC and VERITAS. The detection of many gamma-ray sources not associated with a luminous component of the Local Group, and with identical cut-offs in their energy spectra at the mass of the DM particle, would provide a potential smoking-gun signature of DM annihilations and shed new light on the nature of intermediate and supermassive Black Holes.
fields
gr-qc 1years
2024 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
-
Probing dark matter halo profiles with multi-band observations of gravitational waves
A Fisher-matrix forecast shows that the proposed deci-Hz space detector GWSat would constrain dark matter spike density and slope around intermediate-mass ratio inspirals to sub-percent accuracy, while third-generation ground detectors add modest gains for total masses below 400 solar masses.