66 citations · 214 across the 15 of their papers we have counts for
15 papers
Extended gamma-ray emission in the vicinity of the Westerlund 1 massive star cluster and Kes 41 supernova remnant seen by the Fermi Large Area Telescope
L. Tibaldo, R. Bernet, L. Härer +5
There is growing evidence for cosmic-ray acceleration in massive stellar clusters. Furthermore, extended gamma-ray emission suggests that particle transport in the vicinity of thei…
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…
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…
Suppression of pair beam instabilities in a laboratory analogue of blazar pair cascades
Charles D. Arrowsmith, Francesco Miniati, Pablo J. Bilbao +28
The generation of dense electron-positron pair beams in the laboratory can enable direct tests of theoretical models of -ray bursts and active galactic nuclei. We have successfu…
Deciphering the gamma-ray emission in the Cygnus region
L. Haerer, T. Vieu, F. Schulze +2
The Cygnus region is a vast star-forming complex harbouring a population of powerful objects, including massive star clusters and associations, Wolf-Rayet stars, pulsars, and super…
Stellar-wind feedback and magnetic fields around young compact star clusters: 3D MHD simulations
Lucia Härer, Thibault Vieu, Brian Reville
Context: The environments of young star clusters are shaped by the interactions of the powerful winds of massive stars, and their feedback on the cluster birth cloud. Several such…
Hydrodynamic simulation of Cygnus OB2: the absence of a cluster wind termination shock
Thibault Vieu, Cormac J. K. Larkin, Lucia Härer +3
We perform a large-scale hydrodynamic simulation of a massive star cluster whose stellar population mimics that of the Cygnus OB2 association. The main-sequence stars are first sim…
On the inefficiency of particle re-acceleration mechanisms in the cores of massive stellar clusters
Thibault Vieu, Lucia Härer, Brian Reville
We consider scenarios for non-thermal particle acceleration and re-acceleration in the central cores of compact massive star clusters, aided by insights from high resolution hydrod…
Laboratory realization of relativistic pair-plasma beams
C. D. Arrowsmith, P. Simon, P. Bilbao +26
Relativistic electron-positron plasmas are ubiquitous in extreme astrophysical environments such as black holes and neutron star magnetospheres, where accretion-powered jets and pu…
Understanding the TeV -ray emission surrounding the young massive star cluster Westerlund 1
Lucia K. Härer, Brian Reville, Jim Hinton +2
Context: Young massive star clusters (YMCs) have come increasingly into the focus of discussions on the origin of galactic cosmic rays (CRs). The proposition of CR acceleration ins…
Massive star cluster origin for the galactic cosmic ray population at very-high energies
Thibault Vieu, Brian Reville
We demonstrate that supernova remnant (SNR) shocks embedded within massive star clusters can reproduce both the cosmic-ray proton and all-particle spectra measured in the vicinity…
Can superbubbles accelerate ultra-high energy protons?
Thibault Vieu, Brian Reville, Felix Aharonian
We critically assess limits on the maximum energy of protons accelerated within superbubbles around massive stellar clusters, considering a number of different scenarios. In partic…
Cosmic ray production in superbubbles
Thibault Vieu, Stefano Gabici, Vincent Tatischeff +1
We compute the production of cosmic rays in the dynamical superbubble produced by a cluster of massive stars. Stellar winds, supernova remnants and turbulence are found to accelera…
Nonlinear particle reacceleration by multiple shocks
Thibault Vieu, Stefano Gabici, Vincent Tatischeff
When the pressure of particles accelerated at shock waves is no longer negligible compared to the kinetic pressure of the gas, the linear theory of diffusive shock acceleration bre…
Particle acceleration at colliding shock waves
Thibault Vieu, Stefano Gabici, Vincent Tatischeff
We model the diffusive shock acceleration of particles in a system of two colliding shock waves and present a method to solve the time-dependent problem analytically in the test-pa…