124 citations · 567 across the 29 of their papers we have counts for
29 papers
Same galaxy, different CGM: how the metal loading of galactic winds regulates the baryon cycle in Milky Way-mass galaxies
Prachi Khatri, Freeke van de Voort, Rebekka Bieri +5
The circumgalactic medium (CGM) is both the reservoir of gas that fuels star formation and galaxy growth, and the repository for the mass, energy, and metals expelled through stell…
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…
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.…
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…
Robust magnetic field estimates in star-forming galaxies with the equipartition formula in the absence of equipartition
H. -H. Sandy Chiu, Mateusz Ruszkowski, Maria Werhahn +2
The equipartition model is widely used to estimate magnetic field strength from synchrotron intensity in radio galaxies, yet the validity of its underlying assumptions remains unce…
Unveiling the Impact of Cosmic Rays on the Disc Sizes and Outflows from Dwarf Scales to Galaxy Groups
Rebekka Bieri, Rüdiger Pakmor, Freeke van de Voort +4
Cosmic rays (CRs) are a non-thermal energy component in the interstellar and circumgalactic medium (CGM) that can act as an additional feedback channel beyond thermal and kinetic f…
Auriga Superstars: Improving the resolution and fidelity of stellar dynamics in cosmological galaxy simulations
Ruediger Pakmor, Francesca Fragkoudi, Robert J. J. Grand +7
Cosmological hydrodynamical simulations have become an indispensable tool to understand galaxies. However, computational constraints still severely limit their numerical resolution…
Quantifying the intrinsic variability due to randomness of the Auriga galaxy formation model
Ruediger Pakmor, Rebekka Bieri, Francesca Fragkoudi +6
Numerical simulations have become an indispensable tool in astrophysics. To interpret their results, it is critical to understand their intrinsic variability, that is, how much the…
The role of magnetic fields in ram pressure stripping of satellite galaxies in the circumgalactic medium around massive galaxies
Thomas A. Rintoul, Freeke van de Voort, Andrew T. Hannington +4
The presence of magnetic fields in galaxies and their haloes could have important consequences for satellite galaxies moving through the magnetised circumgalactic medium (CGM) of t…
The dynamical impact of cosmic rays in the Rhea magnetohydrodynamics simulations
Karin Kjellgren, Philipp Girichidis, Junia Göoller +10
This study explores the dynamical impact of cosmic rays (CRs) in Milky Way-like galaxies using the Rhea simulation suite. Cosmic rays, with their substantial energy density, influe…
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…
Anisotropic thermal conduction on a moving mesh for cosmological simulations
Rosie Y. Talbot, Rüdiger Pakmor, Christoph Pfrommer +4
In weakly collisional, strongly magnetised plasmas such as the intracluster medium (ICM), hot accretion flows and the solar corona, the transport of heat and momentum occurs primar…
Environment matters: stronger magnetic fields in satellite galaxies
Maria Werhahn, Rüdiger Pakmor, Rebekka Bieri +3
Magnetic fields are ubiquitous in the universe and an important component of the interstellar medium. It is crucial to accurately model and understand their properties in different…
Simulating Radio Synchrotron Morphology, Spectra, and Polarization of Cosmic Ray Driven Galactic Winds
H. -H. Sandy Chiu, Mateusz Ruszkowski, Timon Thomas +2
The formation of galaxies is significantly influenced by galactic winds, possibly driven by cosmic rays due to their long cooling times and better coupling to plasma compared to ra…
Magnetic field amplification in cosmological zoom simulations from dwarf galaxies to galaxy groups
Ruediger Pakmor, Rebekka Bieri, Freeke van de Voort +6
Magnetic fields are ubiquitous in the Universe. Recently, cosmological simulations of galaxies have successfully begun to incorporate magnetic fields and their evolution in galaxie…
Spectrally resolved cosmic rays -- III. Dynamical impact and properties of the circumgalactic medium
Philipp Girichidis, Maria Werhahn, Christoph Pfrommer +2
Cosmic rays (CRs) are dynamically important for the formation and evolution of galaxies by regulating star formation and by powering galactic outflows. However, to what extent CRs…
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: III. probing cosmic ray calorimetry with radio spectra and the FIR-radio correlation
Maria Werhahn, Christoph Pfrommer, Philipp Girichidis
An extinction-free estimator of the star-formation rate (SFR) of galaxies is critical for understanding the high-redshift universe. To this end, the nearly linear, tight correlatio…
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…
Simulating radio synchrotron emission in star-forming galaxies: small-scale magnetic dynamo and the origin of the far infrared-radio correlation
Christoph Pfrommer, Maria Werhahn, Rüdiger Pakmor +2
In star-forming galaxies, the far-infrared (FIR) and radio-continuum luminosities obey a tight empirical relation over a large range of star-formation rates (SFR). We examine magne…