135 citations · 446 across the 47 of their papers we have counts for
18 papers · 1 filter
Probing the Fundamental Nature of Particle Dark Matter
Marco Regis, Aritra Basu, Geoff Beck +7
Understanding the fundamental nature of dark matter (DM) is one of the most significant scientific challenges of our time. A compelling hypothesis is that DM consists of a new, yet…
WIMP Dark Matter Searches in Reticulum II Using MeerKAT
Shibre Semane, Geoff Beck, Sphesihle Makhathini +2
In the last decade radio astronomy has emerged as a powerful technique for detecting signatures of Weakly Interacting Massive Particles (WIMPs). Dwarf spheroidal galaxies (dSphs) a…
A radio-frequency WIMP search with the MeerKAT Galaxy Cluster Legacy Survey
Natasha Lavis, Michael Sarkis, Geoff Beck +1
Radio-frequency, indirect dark matter searches have recently been gaining prevalence, due to the high sensitivity and resolution capabilities of the new generation of radio interfe…
Simulating the radio emissions of dark matter for new high-resolution observations with MeerKAT
Michael Sarkis, Geoff Beck
Recent work has shown that searches for diffuse radio emission by MeerKAT - and eventually the SKA - are well suited to provide some of the strongest constraints yet on dark matter…
Galaxy clusters in high definition: a dark matter search
Geoff Beck, Michael Sarkis
Recent radio-frequency probes, with the ATCA and ASKAP telescopes, have proven themselves to be at the forefront of placing indirect limits on the properties of dark matter. The la…
Probing dark matter in 2HDMS+S with MeerKAT Galaxy Cluster Legacy Survey data
Natasha Lavis, Geoff Beck
Dark matter is believed to constitute the majority of the matter content of the universe, but virtually nothing is known about its nature. Physical properties of a candidate partic…
Simulated differential observations of the Sunyaev-Zel'dovich Effect: Probing the Dark Ages and Epoch of Reionization
Charles Mpho Takalana, Paolo Marchegiani, Geoff Beck +1
This work presents an analytical approach for studying the cosmological 21cm background signal from the Dark Ages (DA) and subsequent Epoch of Reionization (EoR). We simulate diffe…
Probing quantum gravity using high-energy astrophysics
Justine Tarrant, Geoff Beck, Sergio Colafrancesco
The events observed by LIGO indicate the existence of a large population of intermediate mass black holes. This unexpected result lead to a resurgence in the interest in theories o…
Dark matter gets DAMPE at high energies
Geoff Beck, Sergio Colafrancesco
The DArk Matter Particle Explorer (DAMPE) mission revealed a break in the spectrum of cosmic-ray electons and positrons. This is associated with an excess above the expected backgr…
Probing quantum gravity at low energies
Justine Tarrant, Geoff Beck, Sergio Colafrancesco
Planck stars form when a collapsing shell of matter within a black hole reaches the Planck density, roughly equivalent to the mass being compressed into a volumetric size near that…
Through a Mini Halo, Darkly
Geoff Beck, Sergio Colafrancesco
In this Letter we explore the effects of the scattering of photons incident on a dark matter halo through their interaction with either electrons or photons produced by dark matter…
Exploring the Potential of the Dark Matter Candidate from the Madala Hypothesis with Multi-frequency Indirect Detection
Geoff Beck, Sergio Colafrancesco
The Madala hypothesis was proposed by members of the Wits-ATLAS group to account for several anomalies in both ATLAS and CMS data at the LHC. This hypothesis extends the standard m…
A Multi-frequency analysis of possible Dark Matter Contributions to M31 Gamma-Ray Emissions
Geoff Beck, Sergio Colafrancesco
We examine the possibility of a dark matter (DM) contribution to the recently observed gamma-ray spectrum seen in the M31 galaxy. In particular, we apply limits on Weakly Interacti…
Multi-frequency search for Dark Matter: the role of HESS, CTA, and SKA
Geoff Beck, Sergio Colafrancesco
Dark Matter (DM) remains a vital, but elusive, component in our current understanding of the universe. Accordingly, many experimental searches are devoted to uncovering its nature.…
What Can Gamma-rays from Space tell us About the Madala Hypothesis?
Geoff Beck, Sergio Colafrancesco
The recent Madala hypothesis, a conjecture that seeks to explain anomalies within Large Hadron Collider (LHC) data (particularly in the transverse momentum of the Higgs boson), is…
Hunting Dark Matter in ultra-compact structures within the Milky-Way
Geoff Beck, Sergio Colafrancesco
The local environment is ideal for searching out compact dark structures via the microlensing and multi-frequency emissions as these objects are expected to be faint and microlensi…
A Multi-frequency analysis of dark matter annihilation interpretations of recent anti-particle and gamma-ray excesses in cosmic structures
G. Beck, S. Colafrancesco
The Fermi-LAT observation of a gamma-ray excess from the galactic-centre, as well as the PAMELA, AMS, and AMS-2 anti-particle excesses, and the recent claim of a Fermi-LAT excess i…
Evolution of Dark Matter Halos and their Radio Emissions
S. Colafrancesco, P. Marchegiani, G. Beck
Radio synchrotron emission is expected as a natural by-product of the self-annihilation of super-symmetric dark matter particles. In this work we discuss the general properties of…