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Now showing items 51-58 of 58
Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS 2155-304 energy spectrum
(APS, 2013)
Axionlike particles (ALPs) are hypothetical light (sub-eV) bosons predicted in some extensions of the
Standard Model of particle physics. In astrophysical environments comprising high-energy gamma rays
and turbulent ...
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 ...
Search for photon line-like signatures from dark matter annihilations with H.E.S.S
(APS, 2013)
Gamma-ray line signatures can be expected in the very-high-energy (VHE; E_\gamma > 100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable ...
Search for very-high-energy y-ray emission from galactic globular clusters with H.E.S.S
(EDP Sciences, 2013)
Context. Globular clusters (GCs) are established emitters of high-energy (HE, 100MeV < E < 100 GeV) γ-ray radiation which could originate
from the cumulative emission of the numerous millisecond pulsars (msPSRs) in the ...
Very-high-energy gamma-ray emission from the direction of the Galactic globular cluster Terzan 5
(EDP Sciences, 2011)
The HESS very-high-energy (VHE, E > 0.1 TeV) gamma-ray telescope system has discovered a new source, HESS J1747-248. The measured integral flux is (1.2 ± 0.3) × 10-12 cm-2 s-1 above 440 GeV for a power-law photon spectral ...
Discovery of the VHE gamma-ray source HESS J1832-093 in the vicinity of SNR G22.7-0.2
(Oxford Univ Press, 2015)
The region around the supernova remnant (SNR) W41 contains several TeV sources and has prompted the HESS Collaboration to perform deep observations of this field of view. This resulted in the discovery of the new very high ...
The high-energy γ-ray emission of AP Librae
(EDP Sciences, 2015)
The γ-ray spectrum of the low-frequency-peaked BL Lac (LBL) object AP Librae is studied, following the discovery of very-high-energy (VHE; E> 100 GeV) γ-ray emission up to the TeV range by the H.E.S.S. experiment. This ...
The exceptionally powerful TeV y-ray emitters in the Large Magellanic Cloud
(AAAS, 2015)
The Large Magellanic Cloud, a satellite galaxy of the Milky Way, has been observed with the
High Energy Stereoscopic System (H.E.S.S.) above an energy of 100 billion electron volts
for a deep exposure of 210 hours. Three ...