Max Planck Institute for Nuclear Physics

Search for gamma-ray spectral lines from dark matter annihilation with the H.E.S.S. Inner Galaxy Survey

H. E. S. S. Collaboration, F. Aharonian, H. Ashkar +115

Spectral gamma-ray line features are expected as key signatures from dark matter (DM) annihilations of TeV-scale particle DM. Observations of the Galactic Centre with atmospheric C…

astro-ph.HE2026★ 3 cited

A cosmic-ray loaded nascent outflow driven by a massive star cluster

Marianne Lemoine-Goumard, Lucia Härer, Lars Mohrmann +6

Cosmic rays are widely held to drive outflows from star-forming galaxies and profoundly influence galaxy evolution. Direct evidence for cosmic-ray carrying outflows is however lack…

Microquasar Cygnus X-3 as the PeVatron powering the Cygnus Bubble

Zhaodong Shi, Guangwei Wang, Ruizhi Yang +1

The recent discovery by the LHAASO collaboration of a variable ultra-high-energy (UHE; $E_{γ} \geq$ 100 TeV) $γ$ -ray source associated with the microquasar Cygnus X-3, with a spectrum…

Centaurus A Inner Lobes -- I. Hydrodynamic modeling of a Precessing Jet

Rita C. Anjos, Brian Reville

We present a numerical investigation into the precessing jets of the inner lobes of Centaurus A, focusing on their dynamical evolution and interaction with the surrounding medium.…

Search for long-term variability of HESS J1745-290

H. E. S. S. Collaboration, :, A. Acharyya +116

At the center of our Galaxy lies the bright γ-ray point-like source HESS J1745-290, which is compatible in position with Sgr A star, although an association between the two remains…

Chasing Gamma-Ray Signals from Binary Neutron Star Coalescences with the Cherenkov Telescope Array: Prospects and Observing Strategies

S. Abe, J. Abhir, A. Abhishek +457

The detection of gravitational waves (GWs) from a binary neutron star (BNS) merger by Advanced LIGO and Advanced Virgo (GW170817), together with its electromagnetic counterpart, th…

The second H.E.S.S. gamma-ray burst catalogue: 15 years of observations with the H.E.S.S. telescopes

A. Acharyya, F. Aharonian, C. Arcaro +143

Recent observational efforts using imaging atmospheric Cherenkov telescopes (IACTs) have led to firm detections of very-high-energy (VHE) signals from bright gamma-ray bursts (GRBs…

How interacting winds shape the mechanical feedback of massive star clusters over millions of years

Thibault Vieu, Lucia Härer, Brian Reville

In recent years, massive star cluster environments have proved to be bright sources of very-high energy gamma-rays, in particular young clusters which are powered by the winds inte…

astro-ph.HE2026★ 3 cited

An extreme particle accelerator powered by pulsar PSR J1849-0001

The LHAASO Collaboration

Pulsar wind nebulae (PWNe) are bubbles of relativistic particles, powered by the rotational energy loss of the central pulsars. The Crab Nebula, powered by the Milky Way's most ene…

A precessing jet from a supermassive black hole: multi-wavelength observations of S5 1044+71

M. Cerruti, P. A. Duverne, G. Ganesaratnam +3

The bright gamma-ray blazar S5 1044+71 has been identified as showing very significant quasi-periodic oscillations in the Fermi-LAT data in recent studies, with a periodicity of ab…

astro-ph.HE2026★ 1 cited

Transient Large-Scale Anisotropy in TeV Cosmic Rays due to an Interplanetary Coronal Mass Ejection

Zhen Cao, F. Aharonian, Y. X. Bai +309

Large- or medium-scale cosmic ray anisotropy at TeV energies has not previously been confirmed to vary with time. Transient anisotropy changes have been observed below 150 GeV, esp…

A refined model of secondary photon emission from heavy WIMP annihilations in the Galactic Centre

Rajat Shinde, Julia Djuvsland, Davide Dapaoli +1

Heavy Weakly Interacting Massive Particles (WIMPs) remain a prominent yet less constrained dark matter (DM) candidate, with the Galactic Centre (GC) serving as a prime target for i…

H.E.S.S. detection and multi-wavelength study of the $z \sim$ 1 blazar PKS 0346 $-$ 27

H. E. S. S. collaboration

PKS 0346-27 is a Low Synchrotron Peaked (LSP) blazar at redshift 0.991. The very-high-energy (VHE, E > 100 GeV) spectra of blazars are always affected by $γ γ$ absorption by the Ext…

Massive Star Clusters as sources of high-energy gamma radiation

Luana N. Padilha, Rita C. Anjos

This paper investigates the contribution of massive star clusters (MSC) as sources of high-energy gamma rays and their impact on the ultra-high-energy (UHE) emission observed throu…

The first 10years of the HAWC Gamma-Ray Observatory: science results

Anna Lia Longinotti, HAWC Collaboration

The High-Altitude Water Cherenkov (HAWC) Observatory, located on the slopes of the Sierra Negra volcano in Mexico, began operations in March 2015. Over the past decade, HAWC has en…

Energy-Dependent Shifts of Medium-Scale Anisotropies in Very-High-Energy Cosmic Rays Observed by LHAASO-KM2A

The LHAASO collabration, Zhen Cao, F. Aharonian +310

Small deviations from isotropy in the arrival directions of Galactic cosmic rays serve as a unique probe of the local magnetic environment. In this Letter, we report observations o…

UHECRs Propagation and their Multimessengers: Upper limits and the Impact of the Extragalactic Magnetic Field

Rodrigo Sasse, Rubens Costa, Adriel G. B Mocellin +2

The detection of high-energy astrophysical multimessengers establishes a connection between ultra-high-energy cosmic rays (UHECRs) and powerful cosmic accelerators. Interactions of…

Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV

LHAASO Collaboration, Zhen Cao, F. Aharonian +321

We report a measurement of the cosmic ray helium energy spectrum in the energy interval 0.16 -- 13~PeV, derived by subtracting the proton spectrum from the light component~(proton…

astro-ph.HE2025★ 5 cited

Equation-of-state-informed pulse profile modeling

Mariska Hoogkamer, Nathan Rutherford, Daniela Huppenkothen +9

NICER has enabled mass-radius inferences for pulsars using pulse profile modeling (PPM), providing constraints on the equation of state (EOS) of cold, dense matter. To date, PPM an…

First detection of ultra-high energy emission from gamma-ray binary LS I +61 303

Zhen Cao, F. Aharonian, Y. X. Bai +320

We report the first detection of gamma-ray emission up to ultra-high-energy (UHE; $>$ 100 TeV) emission from the prototypical gamma-ray binary system LS I +61 303 using data from th…

Event types in H.E.S.S.: a combined analysis for different telescope types and energy ranges

Rodrigo Guedes Lang, Tim Unbehaun, Lars Mohrmann +3

Imaging atmospheric Cherenkov telescopes (IACTs) are the main technique for detecting gamma rays with energies between tens of GeV and hundreds of TeV. Amongst them, the High Energ…