A5027026592- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Galaxies: Formation, Evolution, Phenomena
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Atomic and Subatomic Physics Research
- Impact of Light on Environment and Health
- Photocathodes and Microchannel Plates
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
AlbaNova
2016-2019
Stockholm University
2016-2019
Fraunhofer Chalmers Research Centre for Industrial Mathematics
2016-2019
Abstract The region around the Galactic Center (GC) is now well established to be brighter at energies of a few GeV than what expected from conventional models diffuse gamma-ray emission and catalogs known sources. We study excess using 6.5 yr data Fermi Large Area Telescope. characterize uncertainty GC spectrum morphology due uncertainties in cosmic-ray source distributions propagation, distribution interstellar gas Milky Way, potential contribution bubbles. also evaluate properties...
Line-of-sight integrals of the squared density, commonly called J-factor, are essential for inferring dark matter annihilation signals. The J-factors matter-dominated dwarf spheroidal satellite galaxies (dSphs) have typically been derived using Bayesian techniques, which small data samples implies that a choice priors constitutes non-negligible systematic uncertainty. Here we report development new fully frequentist approach to construct profile likelihood J-factor. Using stellar kinematic...
Dwarf spheroidal galaxies are among the most promising targets for indirect dark matter (DM) searches in $\ensuremath{\gamma}$ rays. The $\ensuremath{\gamma}$-ray flux from DM annihilation a dwarf galaxy is proportional to $J$-factor of source. line-of-sight integral mass density squared times $⟨{\ensuremath{\sigma}}_{\mathrm{ann}}{v}_{\mathrm{rel}}⟩/({\ensuremath{\sigma}}_{\mathrm{ann}}{v}_{\mathrm{rel}}{)}_{0}$, where ${\ensuremath{\sigma}}_{\mathrm{ann}}{v}_{\mathrm{rel}}$ cross-section...
Indirect detection strategies of particle Dark Matter (DM) in Dwarf spheroidal satellite galaxies (dSphs) typically entail searching for annihilation signals above the astrophysical background. To robustly compare model predictions with observed fluxes product particles, most analyses data -- which are generally frequentist rely on estimating abundance DM by calculating so-called $\textit{J-factor}$. This quantity is usually inferred from kinematic properties stellar population a dSph using...