88 citations · 762 across the 26 of their papers we have counts for
13 papers · 1 filter
Multi-TeV dark matter density in the inner Milky Way halo: spectral and dynamical constraints
Jaume Zuriaga-Puig, Viviana Gammaldi, Daniele Gaggero +2
We develop a comprehensive study of the gamma-ray flux observed by H.E.S.S. in 5 regions of the Galactic Center (GC). Motivated by previous works on a possible Dark Matter (DM) exp…
Classification of gamma-ray targets for velocity-dependent and subhalo-boosted dark-matter annihilation
Thomas Lacroix, Gaétan Facchinetti, Judit Pérez-Romero +4
Gamma-ray observations have long been used to constrain the properties of dark matter (DM), with a strong focus on weakly interacting massive particles annihilating through velocit…
Reply to a comment on `Understanding the gamma-ray emission from the globular cluster 47 Tuc: evidence for dark matter?'
Anthony M. Brown, Thomas Lacroix, Sheridan Lloyd +2
Analysing 9 years of Fermi-LAT observations, we recently studied the spectral properties of the prominent globular cluster 47 Tuc (Brown et al. 2018). In particular, we investigate…
The glow of annihilating dark matter in Omega Centauri
Anthony M. Brown, Richard Massey, Thomas Lacroix +3
Dark matter (DM) is the most abundant material in the Universe, but has so far been detected only via its gravitational effects. Several theories suggest that pairs of DM particles…
Robust cosmic-ray constraints on -wave annihilating MeV dark matter
Mathieu Boudaud, Thomas Lacroix, Martin Stref +1
We recently proposed a method to constrain -wave annihilating MeV dark matter from a combination of the Voyager 1 and the AMS-02 data on cosmic-ray electrons and positrons. Voya…
Understanding the -ray emission from the globular cluster 47 Tuc: evidence for dark matter?
Anthony M. Brown, Thomas Lacroix, Sheridan Lloyd +2
47 Tuc was the first globular cluster observed to be -ray bright, with the -rays being attributed to a population of unresolved millisecond pulsars (MSPs). Recent kinematic d…
Connecting the new H.E.S.S. diffuse emission at the Galactic center with the Fermi GeV excess: a combination of millisecond pulsars and heavy dark matter?
Thomas Lacroix, Joseph Silk, Emmanuel Moulin +1
The H.E.S.S. collaboration has reported a high-energy spherically symmetric diffuse gamma-ray emission in the inner 50 pc of the Milky Way, up to ~ 50 TeV. Here we propose a lepton…
Discovery of a new extragalactic source population of energetic particles
Anthony M. Brown, Celine Bœhm, Jamie Graham +3
We report the discovery of a statistically significant hardening in the Fermi-LAT -ray spectrum of Centaurus A's core, with the spectral index hardening from $Γ_{1}=2.73 \pm 0.0…
The Spatial Morphology of the Secondary Emission in the Galactic Center Gamma-Ray Excess
Thomas Lacroix, Oscar Macias, Chris Gordon +3
Excess GeV gamma rays from the Galactic Center (GC) have been measured with the Fermi Large Area Telescope (LAT). The presence of the GC excess (GCE) appears to be robust with resp…
Fitting the Fermi-LAT GeV excess: on the importance of the propagation of electrons from dark matter
Thomas Lacroix
An excess of gamma rays at GeV energies has been detected in the Fermi-LAT data. This signal comes from a narrow region around the Galactic Center and has been interpreted as possi…
A possible link between the GeV excess and the 511 keV emission line in the Galactic Centre
Celine Boehm, Paolo Gondolo, Pierre Jean +3
The morphology and characteristics of the so-called GeV gamma-ray excess detected in the Milky Way lead us to speculate about a possible common origin with the 511 keV line mapped…
Fitting the Fermi-LAT GeV excess: On the importance of including the propagation of electrons from dark matter
Thomas Lacroix, Celine Boehm, Joseph Silk
An excess of gamma rays at GeV energies has been pointed out in the Fermi-LAT data. This signal comes from a narrow region centred around the Galactic center and has been interpret…
Probing a dark matter density spike at the Galactic Center
Thomas Lacroix, Celine Boehm, Joseph Silk
The dark matter halo profile in the inner Galaxy is very uncertain. Yet its radial dependence toward the Galactic Center is of crucial importance for the determination of the gamma…