Search for dark matter signals towards a selection of recently detected DES dwarf galaxy satellites of the Milky Way with H.E.S.S.
Physical Review D American Physical Society (APS) 102:6 (2020) 062001
On the relative importance of hadronic emission processes along the jet axis of Active Galactic Nuclei
Monthly Notices of the Royal Astronomical Society Oxford University Press 496:3 (2020) 2885-2901
Abstract:
With the coincident detection of a gamma-ray flare and a neutrino from the blazar TXS 0506+056, active galactic nuclei (AGNs) have been put into focus as possible sources of the diffuse neutrino flux. We present a space and time-resolved model of the high-energy particle emission of a plasmoid assumed to travel along the axis of an AGN jet at relativistic speed. This was achieved by modifying the publicly available CRPROPA (version 3.1+) propagation framework that in our work is capable of being applied to source physics on sub-kpc scales. The propagation of a population of primary protons is modelled in a purely turbulent magnetic field and we take into account interactions of these protons with photons scattered from the accretion disc, synchrotron radiation emitted by ambient relativistic electrons, as well with themselves and with other ambient matter. Our model produces a PeV-neutrino flare caused mainly by photohadronic interactions of primaries with the accretion disc field. Secondary high-energy gamma-rays partly attenuate with the ambient photon fields whose combined optical depths achieve their minimal opacity for photons of around 10 TeV. Thus, our model is well capable of producing neutrino flares with a significantly reduced emission of gamma-rays in jets with a hadronic jet component that in the future can be fit to specific AGN flare scenarios.Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 494:4 (2020) 5590-5602
Probing the Magnetic Field in the GW170817 Outflow Using H.E.S.S. Observations
The Astrophysical Journal Letters American Astronomical Society 894:2 (2020) l16
Detection of very-high-energy γ-ray emission from the colliding wind binary η Car with H.E.S.S.
Astronomy & Astrophysics EDP Sciences 635 (2020) a167