354 citations · 2.8k across the 54 of their papers we have counts for
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Evidence of 100 TeV -ray emission from HESS J1702-420: A new PeVatron candidate
H. Abdalla, F. Aharonian, F. Ait Benkhali +232
The identification of PeVatrons, hadronic particle accelerators reaching the knee of the cosmic ray spectrum (few eV), is crucial to understand the origin of cosmic rays…
Extragalactic magnetic field constraints from ultra-high-energy cosmic rays from local galaxies
Arjen van Vliet, Andrea Palladino, Andrew Taylor +1
We interpret the correlation between local star-forming galaxy positions and ultra-high-energy cosmic ray (UHECR) directions, recently detected by the Pierre Auger Observatory (PAO…
Particle acceleration in radio galaxies with flickering jets: GeV electrons to ultrahigh energy cosmic rays
James H. Matthews, Andrew M. Taylor
Variability is a general property of accretion discs and their associated jets. We introduce a semi-analytic model for particle acceleration and radio jet/lobe evolution and explor…
Ultrahigh-energy dipole and beyond
Rodrigo Guedes Lang, Andrew M. Taylor, Vitor de Souza
Recent data from the Pierre Auger Observatory has revealed the presence of a large-scale dipole in the arrival direction distribution of ultra-high energy cosmic rays (UHECR). In t…
Revisiting the distance to the nearest UHECR source: Effects of extra-galactic magnetic fields
Rodrigo Guedes Lang, Andrew M. Taylor, Markus Ahlers +1
We update the constraints on the location of the nearest UHECR source. By analyzing recent data from the Pierre Auger Observatory using state-of-the-art CR propagation models, we r…
Extension of the synchrotron radiation of electrons to very high energies in clumpy environments
Dmitry Khangulyan, Felix Aharonian, Carlo Romoli +1
The synchrotron cooling of relativistic electrons is one of the most effective radiation mechanisms in astrophysics. It not only accompanies the process of particle acceleration bu…
Progress in unveiling extreme particle acceleration in persistent astrophysical jets
Jonathan Biteau, Elisa Prandini, Luigi Costamante +7
The most powerful persistent accelerators in the Universe are jetted active galaxies. Blazars, galaxies whose jets are directed towards Earth, dominate the extragalactic gamma-ray…
Searches for counterparts of gravitational waves at very high energies with H.E.S.S
Monica Seglar-Arroyo, Halim Ashkar, Simon Bonnefoy +10
The recent milestones in multi-messenger astronomy have opened new ways to study the Unverse. The unprecedented gravitational wave (GW) follow-up campaigns established the power th…
The Effects of the Galactic Magnetic Field on UHECR From Local Sources
Andrew M. Taylor, A. M. Hillas
We summarise the results found following a study of the effects that Galactic magnetic fields can have on the propagation of cosmic rays from local extragalactic sources. This stud…
Open Questions in Cosmic-Ray Research at Ultrahigh Energies
Rafael Alves Batista, Jonathan Biteau, Mauricio Bustamante +13
We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the `The High-Energy Un…
Flux Distribution of Gamma-Ray Emission in Blazars: The Example of Mrk 501
Carlo Romoli, Nachiketa Chakraborty, Daniela Dorner +2
Flux distribution is an important tool to understand the variability processes in active galactic nuclei. We now have available a great deal of observational evidences pointing tow…
A hadronuclear interpretation of a high-energy neutrino event coincident with a blazar flare
Ruo-Yu Liu, Kai Wang, Rui Xue +4
Although many high-energy neutrinos detected by the IceCube telescope are believed to have anextraterrestrial origin, their astrophysical sources remain a mystery. Recently, an unp…
Binary Neutron Star Merger Remnants as Sources of Cosmic Rays Below the "Ankle"
Xavier Rodrigues, Daniel Biehl, Denise Boncioli +1
We investigate non-thermal electron and nuclei energy losses within the binary neutron star merger remnant produced by the event GW170817. The lack of a cooling feature within the…
Energetic gamma-ray emission from solar flares
Ervin Kafexhiu, Carlo Romoli, Andrew M. Taylor +1
Recent advances in the -ray observations of solar flares by the \textit{Fermi} satellite, demand revisions in the hadronic -ray flux computation below 1 GeV. In this work we…
Galactic Cosmic-Rays in a Breeze
Gwenael Giacinti, Andrew M. Taylor
We study a scenario in which the Fermi bubbles are formed through a Galactocentric outflow of gas and pre-accelerated cosmic-rays (CR). We take into account CR energy losses due to…
Extragalactic Observations with HESS: Past and Future
Andrew M. Taylor, David Sanchez, Matteo Cerruti
The present H.E.S.S. II era of the H.E.S.S. collaboration follows from the successful upgrade of the H.E.S.S. array, and the first published results obtained with this new instrume…
UHECR propagation from Centaurus A
Sarka Wykes, Andrew M. Taylor, Justin D. Bray +2
In the light of the recently predicted isotopic composition of the kpc-scale jet in Centaurus A, we re-investigate whether this source could be responsible for some of the ultra-hi…
Gamma-ray blazar spectra with H.E.S.S. II mono analysis: the case of PKS 2155-304 and PG 1553+113
D. Zaborov, A. M. Taylor, D. A. Sanchez +2
The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity to lower energies, providing new opportunities for studies of Active Ga…
Gamma-ray blazar spectra with H.E.S.S. II mono analysis: the case of PKS 2155-304 and PG 1553+113
H. E. S. S. Collaboration, :, H. Abdalla +332
The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity to lower energies. The lowest energy threshold is obtained using monosc…
Cosmic Rays in a Galactic Breeze
Andrew M. Taylor, Gwenael Giacinti
Motivated by the discovery of the non-thermal Fermi bubble features both below and above the Galactic plane, we investigate a scenario in which these bubbles are formed through Gal…
Indication of a Local "Fog" of Sub-Ankle UHECR
Ruo-Yu Liu, Andrew M. Taylor, Xiang-Yu Wang +1
During their propagation through intergalactic space, ultrahigh energy cosmic rays (UHECRs) interact with the background radiation fields. These interactions give rise to energetic…
AGN observations with a less than 100 GeV threshold using H.E.S.S. II
Dmitry Zaborov, Carlo Romoli, Andrew M. Taylor +3
The recent addition of the 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity towards low energies. The lowest energy threshold is obtained…
Rapid variability at very high energies in Mrk 501
Nachiketa Chakraborty, Gabriele Cologna, Max Anton Kastendieck +5
A major flaring state of the BL Lac object Mrk 501 was observed by the High Energy Stereoscopic System (H.E.S.S.) in June, 2014. Flux levels higher than one Crab unit were recorded…
Spectral characteristics of Mrk 501 during the 2012 and 2014 flaring states
Gabriele Cologna, Nachiketa Chakraborty, Mahmoud Mohamed +6
Observations at Very High Energies (VHE, E > 100 GeV) of the BL Lac object Mrk 501 taken with the High Energy Stereoscopic System (H.E.S.S.) in four distinct periods between 2004 a…