Browsing by Subject "Dark matter"
Now showing items 1-10 of 10
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Dark interactions beyond the Lambda-CDM model
(North-West University (South Africa), 2022)In this study, cosmological models are considered, where dark matter and dark energy are coupled and may exchange energy through non-gravitational interactions with one other. These interacting dark energy (IDE) models ... -
A dynamical systems analysis of interacting dark energy models
(North-West University (South Africa), 2022)We investigate using dynamical system analysis; the impacts of various interaction models whereby dark energy is coupled with dark matter. Examination on the nature of critical points for each interaction model introduced ... -
H.E.S.S. limits on linelike dark matter signatures in the 100 GeV to 2 TeV energy range close to the galactic center
(APS, 2016)A search for dark matter line-like signals was performed in the vicinity of the Galactic Centre by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis was developed to improve the ... -
No evidence for extensions to the standard cosmological model
(American Physical Society, 2017)We compute the Bayesian evidence for models considered in the main analysis of Planck cosmic microwave background data. By utilizing carefully defined nearest-neighbor distances in parameter space, we reuse the Monte Carlo ... -
Observations of the Sagitarrius dwarf galaxy by the HESS experiment and search for a dark matter signal
(Elsevier, 2008)Observations of the Sagittarius dwarf spheroidal (Sgr dSph) galaxy were carried out with the HESS array of four imaging air Cherenkov telescopes in June 2006. A total of 11 h of high quality data are available after data ... -
Search for a dark matter annihilation signal from the galactic center halo with H.E.S.S.
(APS, 2011)A search for a very-high-energy (VHE; ≥100 GeV) γ-ray signal from self-annihilating particle dark matter (DM) is performed towards a region of projected distance r∼45–150 pc from the Galactic center. The background-subtracted ... -
A search for a dark matter annihilation signal toward the Canis Major overdensity with H.E.S.S.
(EDP Sciences, 2009)A search for a dark matter (DM) annihilation signal into γ -rays toward the direction of the Canis Major (CMa) overdensity is presented. The nature of CMa is still controversial and one scenario represents it as a dwarf ... -
Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S.
(APS, 2016)The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles ... -
Search for dark matter signals towards a selection of recently detected DES dwarf galaxy satellites of the Milky Way with HESS
(APS, 2020)Dwarf spheroidal galaxy satellites of the Milky Way are prime targets for indirect detection of dark matter with gamma rays due to their proximity, high dark matter content, and absence of nonthermal emission processes. ...
