Timur Delahaye
(Oskar Klein Centre)
21/09/2015, 16:30
We study the possibility of improving the constraints on the lifetime of gravitino dark matter in scenarios with bilinear R-parity violation by estimating the amount of cosmic-ray antideuterons that can be produced in gravitino decays. Taking into account all different sources of theoretical uncertainties, we find that the margin of improvement beyond the limits already set by cosmic-ray...
Filippo Sala
(CEA/Saclay and CNRS)
21/09/2015, 17:10
We reconsider the model of Minimal Dark Matter (a fermionic, hypercharge-less quintuplet of the EW interactions) and compute its gamma ray signatures. We compare them with a number of gamma ray probes: the galactic halo diffuse measurements, the galactic center line searches and recent dwarf galaxies observations. We find that the original minimal model, whose mass is fixed at 9.4 TeV by the...
Mattia Fornasa
(GRAPPA Institute (University of Amsterdam))
21/09/2015, 17:35
Complementarity in the search for Dark Matter (DM) is realised when, for example, you use indirect detection gamma-ray data for infer information on the expected event rate in a direct detection experiment. However, one should take care of adopting the same assumptions when combining different detection strategies. I will assume that the excess measured by Fermi-LAT from the Galactic Centre is...
Michael Feyereisen
(University of Amsterdam)
22/09/2015, 08:30
The one-point function (i.e., the isotropic flux distribution) is a complementary method to (anisotropic) two-point correlations in searches for a gamma-ray dark matter annihilation signature. Using analytical models of structure formation and dark matter halo properties, we compute the gamma-ray flux distribution due to annihilations in extragalactic dark matter halos, as it would be observed...
Mr
Stephan Zimmer
(OKC/ Stockholm University)
22/09/2015, 08:55
Galaxy clusters are the most massive bound systems known in the universe and are believed to have formed through large scale structure formation. As such they host relativistic cosmic-ray (CR) populations and are gravitationally bound by large amounts of Dark Matter (DM). Both provide conditions in which high-energy gamma rays may be produced either via CR interactions with the intracluster...
Fabio Zandanel
(University of Amsterdam)
22/09/2015, 09:20
Taking as reference the performance of the soon-to-be-launched eROSITA satellite, I will discuss the potential of angular auto- and cross-correlation power spectra in identifying sterile neutrino dark matter in the cosmic X-ray background. While sterile neutrino decays are always sub-dominant in the auto-correlation power spectra with respect to other background sources, they can be...
Miguel Sánchez-Conde
(Oskar Klein Centre, Stockholm University)
22/09/2015, 10:30
We search for evidence of dark matter (DM) annihilation in the isotropic gamma-ray background (IGRB) measured with 50 months of Fermi Large Area Telescope (LAT) observations. An improved theoretical description of the cosmological DM annihilation signal, based on two complementary techniques and assuming generic WIMP properties, renders more precise predictions compared to previous work. We...
Christoph Weniger
(University of Amsterdam)
22/09/2015, 11:10
Using gamma-ray data from the Fermi Large Area Telescope, various groups have
identified a clear excess emission in the inner Galaxy, at energies around a
few GeV. This excess resembles remarkably well a signal from dark matter
annihilation. One of the most compelling astrophysical interpretations is that
the excess is caused by the combined effect of a previously undetected
population...
