124 citations · 567 across the 29 of their papers we have counts for
9 papers · 1 filter
Zooming in on radio relics -- II. How relic morphology probes density fluctuations at the edge of galaxy clusters
Joseph Whittingham, Christoph Pfrommer, Maria Werhahn +2
Gas properties in the outer intracluster medium (ICM) are not well-constrained, as traditional probes lose sensitivity at Mpc distances. We show that the morphology of radio relics…
The diffuse gamma-ray sky of a Milky Way analogue: Local diversity and global constraints
Karin Kjellgren, Philipp Girichidis, Maria Werhahn +8
Diffuse gamma-ray emission is a key tracer of cosmic rays (CRs) in galaxies, encoding information about their transport, energetics, and interactions with the interstellar medium.…
Zooming-in on cluster radio relics -- I. How density fluctuations explain the Mach number discrepancy, microgauss magnetic fields, and spectral index variations
Joseph Whittingham, Christoph Pfrommer, Maria Werhahn +2
It is generally accepted that radio relics are the result of synchrotron emission from shock-accelerated electrons. Current models, however, are still unable to explain several asp…
Gamma-ray emission from spectrally resolved cosmic rays in galaxies
Maria Werhahn, Philipp Girichidis, Christoph Pfrommer +1
Cosmic rays (CRs) are ubiquitous in the interstellar medium (ISM) of nearby galaxies, but many of their properties are not well-constrained. Gamma-ray observations provide a powerf…
Cosmic rays and non-thermal emission in simulated galaxies. II. -ray maps, spectra and the far infrared--ray relation
Maria Werhahn, Christoph Pfrommer, Philipp Girichidis +1
The -ray emission of star-forming (SF) galaxies is attributed to hadronic interactions of cosmic ray (CR) protons with the interstellar gas and contributions from CR electrons v…
Cosmic rays and non-thermal emission in simulated galaxies. I. Electron and proton spectra compared to Voyager-1 data
Maria Werhahn, Christoph Pfrommer, Philipp Girichidis +2
Current-day cosmic ray (CR) propagation studies use static Milky-Way models and fit parametrized source distributions to data. Instead, we use three-dimensional magneto-hydrodynami…
Evolution and observational signatures of the cosmic ray electron spectrum in SN 1006
Georg Winner, Christoph Pfrommer, Philipp Girichidis +2
Supernova remnants (SNRs) are believed to be the source of Galactic cosmic rays (CRs). SNR shocks accelerate CR protons and electrons which reveal key insights into the non-thermal…
Missing Gamma-ray Halos and the Need for New Physics in the Gamma-ray Sky
Avery E. Broderick, Paul Tiede, Philip Chang +5
An intergalactic magnetic field stronger than ~G would explain the lack of a bright, extended degree-scale, GeV-energy inverse Compton component in the gamma-ray s…
Constraining the coherence scale of the interstellar magnetic field using TeV gamma-ray observations of supernova remnants
Matteo Pais, Christoph Pfrommer, Kristian Ehlert +2
Galactic cosmic rays (CRs) are believed to be accelerated at supernova remnant (SNR) shocks. In the hadronic scenario the TeV gamma-ray emission from SNRs originates from decaying…