202 citations · 877 across the 23 of their papers we have counts for
23 papers
Phase-dependent magnetic coherence in the turbulent interstellar medium
Iryna S. Butsky, Caleb Redshaw, Minjie Lei +2
Magnetic fields permeate the multiphase interstellar medium (ISM), yet their phase-dependent structure remains poorly constrained by observations. Dust polarization and \ion{H}{1}…
Strong Evidence for Cosmic Ray-Supported L Galaxy Halos via X-ray \& tSZ Constraints
Sam B. Ponnada, Philip F. Hopkins, Yue Samuel Lu +3
Many state-of-the-art galaxy simulations featuring traditional feedback modes have significant challenges producing enough extended soft X-ray ( keV) emission at R $\si…
Neutral gas phase distribution from HI morphology: phase separation with scattering spectra and variational autoencoders
Minjie Lei, S. E. Clark, Rudy Morel +4
Unraveling the multi-phase structure of the diffuse interstellar medium (ISM) as traced by neutral hydrogen (HI) is essential to understanding the lifecycle of the Milky Way. Howev…
Hooks, Lines, and Sinkers: How AGN Feedback and Cosmic-Ray Transport shape the Far Infrared-Radio Correlation of Galaxies
Sam B. Ponnada, Rachel K. Cochrane, Philip F. Hopkins +7
The far-infrared (FIR) - radio correlation (FRC) is one of the most promising empirical constraints on the role of cosmic-rays (CRs) and magnetic fields (\textbf{B}) in galaxy form…
Cold Gas Subgrid Model (CGSM): A Two-Fluid Framework for Modeling Unresolved Cold Gas in Galaxy Simulations
Iryna S. Butsky, Cameron B. Hummels, Philip F. Hopkins +2
The cold () component of the circumgalactic medium (CGM) accounts for a significant fraction of all galactic baryons. However, using current galaxy-scale simu…
Synchrotron Signatures of Cosmic Ray Transport Physics in Galaxies
Sam B. Ponnada, Iryna S. Butsky, Raphael Skalidis +7
Cosmic rays (CRs) may drive outflows and alter the phase structure of the circumgalactic medium, with potentially important implications on galaxy formation. However, these effects…
Synchrotron Emission on FIRE: Equipartition Estimators of Magnetic Fields in Simulated Galaxies with Spectrally-Resolved Cosmic Rays
Sam B. Ponnada, Georgia V. Panopoulou, Iryna S. Butsky +7
Synchrotron emission is one of few observable tracers of galactic magnetic fields (\textbf{B}) and cosmic rays (CRs). Much of our understanding of \textbf{B} in galaxies comes from…
Galactic Cosmic-ray Scattering due to Intermittent Structures
Iryna S. Butsky, Philip F. Hopkins, Philipp Kempski +3
Cosmic rays (CRs) with energies TeV comprise a significant component of the interstellar medium (ISM). Major uncertainties in CR behavior on observable scales (much larger th…
A Simple Sub-Grid Model For Cosmic Ray Effects on Galactic Scales
Philip F. Hopkins, Iryna S. Butsky, Suoqing Ji +1
Many recent numerical studies have argued that cosmic rays (CRs) from supernovae (SNe) or active galactic nuclei (AGN) could play a crucial role in galaxy formation, in particular…
Constraining Cosmic-ray Transport with Observations of the Circumgalactic Medium
Iryna S. Butsky, Shreya Nakum, Sam B. Ponnada +3
Recent theoretical studies predict that the circumgalactic medium (CGM) around low-redshift, galaxies could have substantial nonthermal pressure support in the form of c…
Magnetic Fields on FIRE: Comparing B-fields in the multiphase ISM and CGM of Simulated L Galaxies to Observations
Sam B. Ponnada, Georgia V. Panopoulou, Iryna S. Butsky +7
The physics of magnetic fields () and cosmic rays (CRs) have recently been included in simulations of galaxy formation. However, significant uncertainties remain in how…
Standard Self-Confinement and Extrinsic Turbulence Models for Cosmic Ray Transport are Fundamentally Incompatible with Observations
Philip F. Hopkins, Jonathan Squire, Iryna S. Butsky +1
Models for cosmic ray (CR) dynamics fundamentally depend on the rate of CR scattering from magnetic fluctuations. In the ISM, for CRs with energies ~MeV-TeV, these fluctuations are…
First Predicted Cosmic Ray Spectra, Primary-to-Secondary Ratios, and Ionization Rates from MHD Galaxy Formation Simulations
Philip F. Hopkins, Iryna S. Butsky, Georgia V. Panopoulou +4
We present the first simulations evolving resolved spectra of cosmic rays (CRs) from MeV-TeV energies (including electrons, positrons, (anti)protons, and heavier nuclei), in live k…
Thermal Instabilities and Shattering in the High-Redshift WHIM: Convergence Criteria and Implications for Low-Metallicity Strong HI Absorbers
Nir Mandelker, Frank C. van den Bosch, Volker Springel +5
Using a novel suite of cosmological simulations zooming in on a Mpc-scale intergalactic sheet or "pancake" at z~3-5, we conduct an in-depth study of the thermal properties and HI c…
Simulating Groups and the IntraGroup Medium: The Surprisingly Complex and Rich Middle Ground Between Clusters and Galaxies
Benjamin D. Oppenheimer, Arif Babul, Yannick Bahé +2
Galaxy groups are more than an intermediate scale between clusters and halos hosting individual galaxies, they are crucial laboratories capable of testing a range of astrophysics f…
The Impact of Cosmic Rays on the Kinematics of the Circumgalactic Medium
Iryna S. Butsky, Jessica K. Werk, Kirill Tchernyshyov +9
We use hydrodynamical simulations of two Milky Way-mass galaxies to demonstrate the impact of cosmic-ray pressure on the kinematics of cool and warm circumgalactic gas. Consistent…
A Consistent Reduced-Speed-of-Light Formulation of Cosmic Ray Transport Valid in Weak and Strong-Scattering Regimes
Philip F. Hopkins, Jonathan Squire, Iryna S. Butsky
We derive a consistent set of moments equations for CR-magnetohydrodynamics, assuming a gyrotropic distribution function (DF). Unlike previous efforts we derive a closure, akin to…
The Impact of Cosmic Rays on Thermal Instability in the Circumgalactic Medium
Iryna S. Butsky, Drummond B. Fielding, Christopher C. Hayward +3
Large reservoirs of cold (~ 10^4 K) gas exist out to and beyond the virial radius in the circumgalactic medium (CGM) of all types of galaxies. Photoionization modeling suggests tha…
Ultraviolet Signatures of the Multiphase Intracluster and Circumgalactic Media in the RomulusC Simulation
Iryna S. Butsky, Joseph N. Burchett, Daisuke Nagai +3
Quasar absorption-line studies in the ultraviolet (UV) can uniquely probe the nature of the multiphase cool-warm (10^4 < T < 10^6 K) gas in and around galaxy clusters, promising to…
Ultraviolet Perspectives on Diffuse Gas in the Largest Cosmic Structures
Joseph N. Burchett, Daisuke Nagai, Iryna Butsky +31
The past decade has seen an explosion of discoveries and new insights into the diffuse gas within galaxies, galaxy clusters, and the filaments composing the Cosmic Web. A new decad…
The Impact of Enhanced Halo Resolution on the Simulated Circumgalactic Medium
Cameron B. Hummels, Britton D. Smith, Philip F. Hopkins +7
Traditional cosmological hydrodynamics simulations fail to spatially resolve the circumgalatic medium (CGM), the reservoir of tenuous gas surrounding a galaxy and extending to its…
The Role of Cosmic Ray Transport in Shaping the Simulated Circumgalactic Medium
Iryna Butsky, Thomas R. Quinn
The majority of galactic baryons reside outside of the galactic disk in the diffuse gas known as the circumgalactic medium (CGM). While state-of-the art simulations excel at reprod…
Ab initio Simulations of a Supernova Driven Galactic Dynamo in an Isolated Disk Galaxy
Iryna Butsky, Jonathan Zrake, Ji-hoon Kim +2
We study the magnetic field evolution of an isolated spiral galaxy, using isolated Milky Way-mass galaxy formation simulations and a novel prescription for magnetohydrodynamic (MHD…