36 citations · 75 across the 15 of their papers we have counts for
15 papers
Merging galaxies and clusters: Insights into the role of magnetic fields and the physics of radio relics
Joseph Whittingham
Mergers have long been understood to be a driver of galaxy and galaxy cluster evolution. They release tremendous amounts of gravitational potential energy - ~ and ~$10^{64…
The PICO-Cluster Project: presenting the galaxy cluster sample and studying magnetic field growth, Faraday rotation and Braginskii heating
Thomas Berlok, Christoph Pfrommer, Ewald Puchwein +9
Galaxy clusters constitute a microcosm of the Universe and offer a unique laboratory for studying plasma astrophysics, encompassing processes such as cosmic-ray acceleration and no…
Active galactic nucleus driven jet feedback in cosmologically forming cool-core galaxy clusters I: The effect of hierarchical assembly on intra-cluster medium properties
Rainer Weinberger, Lorenzo Maria Perrone, Christoph Pfrommer +7
The atmospheres of cool-core galaxy clusters are excellent probes of astrophysical plasmas. However, how the interplay between assembly and active galactic nucleus (AGN) feedback l…
Simulating realistic radio morphologies of Fanaroff-Riley I jets in a self-regulating cool-core cluster
Léna Jlassi, Rainer Weinberger, Christoph Pfrommer +3
Active galactic nucleus (AGN) jets radiate radio synchrotron emission displaying a wide range of morphologies. At the same time, they provide heat to prevent cooling flows in cool-…
Revisiting radio synchrotron diagnostics in star-forming galaxies
Maria Werhahn, Christoph Pfrommer, Philipp Girichidis +7
Radio continuum observations are widely used to study cosmic ray (CR) electron populations and transport processes in star-forming galaxies, but their interpretation relies on seve…
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…
Simulating cosmic ray electron spectra and radio emission from an AGN jet outburst in a cool-core cluster
Léna Jlassi, Rainer Weinberger, Christoph Pfrommer +3
Active galactic nucleus (AGN) powered jets can accelerate cosmic ray electrons, leading to the observed radio synchrotron emission. To simulate this emission, jet dynamics in galax…
Steady-State or Not? The Evolution of Cosmic Ray Electron Spectra in Galaxies
Maria Werhahn, Christoph Pfrommer, Joseph Whittingham +4
Cosmic ray (CR) electrons are key tracers of non-thermal processes in galaxies, yet their spectra are often modelled under the untested assumption of steady state between injection…
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…
Magnetic dynamos in galaxy clusters: the crucial role of galaxy formation physics at high redshifts
Larissa Tevlin, Thomas Berlok, Christoph Pfrommer +6
Observations of Faraday rotation and synchrotron emission in galaxy clusters imply large-scale magnetic fields with strengths possibly extending back to . Non-ra…
Anisotropic Velocity Fluctuations in Galaxy Mergers: A Probe of the Magnetic Field
Yue Hu, Joseph Whittingham, A. Lazarian +3
Magnetic fields and turbulence are fundamental to the evolution of galaxies, yet their precise measurement and analysis present significant challenges. The recently developed Veloc…
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…
The impact of magnetic fields on cosmological galaxy mergers -- II. Modified angular momentum transport and feedback
Joseph Whittingham, Martin Sparre, Christoph Pfrommer +1
The role of magnetic fields in galaxy evolution is still an unsolved question in astrophysics. We have previously shown that magnetic fields play a crucial role in major mergers be…
Gas flows in galaxy mergers: supersonic turbulence in bridges, accretion from the circumgalactic medium, and metallicity dilution
Martin Sparre, Joseph Whittingham, Mitali Damle +5
In major galaxy mergers, the orbits of stars are violently perturbed, and gas is torqued to the centre, diluting the gas metallicity and igniting a starburst. In this paper, we stu…
The impact of magnetic fields on cosmological galaxy mergers. I: Reshaping gas and stellar discs
Joseph Whittingham, Martin Sparre, Christoph Pfrommer +1
Mergers play an important role in galaxy evolution. In particular, major mergers are able to have a transformative effect on galaxy morphology. In this paper, we investigate the ro…