177 citations · 1.3k across the 28 of their papers we have counts for
28 papers
Effects of Viscosity on Sloshing Cold Fronts in Galaxy Clusters
Ming-Hsueh Hsieh, H. -Y. Karen Yang, John ZuHone
The viscous properties of the intracluster medium (ICM) remain poorly constrained. Cold fronts-sharp discontinuities formed during cluster mergers-offer a potential avenue to probe…
Simulating AGN feedback in galaxy clusters with pre-existing turbulence
Jia-Lun Li, H. -Y. Karen Yang
Feedback from active galactic nuclei (AGN) is believed to play a significant role in suppressing cooling flows in cool-core (CC) clusters. Turbulence in the intracluster medium (IC…
Can the symmetric Fermi and eROSITA bubbles be produced by tilted jets?
Po-Hsun Tseng, H. -Y. Karen Yang, Chun-Yen Chen +2
The Fermi Gamma-Ray Space Telescope reveals two large bubbles in the Galaxy, extending nearly symmetrically above and below the Galactic center (GC). Previous simu…
Cosmic ray processes in galactic ecosystems
Ellis R. Owen, Kinwah Wu, Yoshiyuki Inoue +2
Galaxy evolution is an important topic, and our physical understanding must be complete to establish a correct picture. This includes a thorough treatment of feedback. The effects…
Evolution and feedback of AGN Jets of different Cosmic-ray Composition
Yen-Hsing Lin, H. -Y. Karen Yang, Ellis R. Owen
Jet feedback from active galactic nuclei (AGN) is one of the most promising mechanisms for suppressing cooling flows in cool-core clusters. However, the composition of AGN jets and…
Fermi and eRosita bubbles as relics of the past activity of the Galactic black hole
H. -Y. Karen Yang, M. Ruszkowski, E. Zweibel
The newly launched X-ray satellite, eRosita, has recently revealed two gigantic bubbles extending to ~80 degrees above and below the Galactic center. The morphology of these "eRosi…
Production Efficiencies of Sound Waves in the Intracluster Medium Driven by AGN Jets
Shiang-Chih Wang, H. -Y. Karen Yang
Feedback from active galactic nuclei (AGN) is believed to be the most promising solution to the cooling flow problem in cool-core clusters, though how exactly the jet energy is tra…
Emission from hadronic and leptonic processes in galactic jet-driven bubbles
Ellis R. Owen, H. -Y. Karen Yang
We investigate the multiwavelength emission from hadronic and leptonic cosmic rays (CRs) in bubbles around galaxies, analogous to the Fermi bubbles of the Milky Way. The bubbles ar…
Multi-wavelength emission from leptonic processes in ageing galaxy bubbles
Ellis R. Owen, H. -Y. Karen Yang
The evolutionary behavior and multi-wavelength emission properties of bubbles around galaxies, such as the \textit{Fermi} bubbles of the Milky Way, is unsettled. We perform 3D magn…
Non-Kolmogorov turbulence in multiphase intracluster medium driven by cold gas precipitation and AGN jets
C. Wang, M. Ruszkowski, C. Pfrommer +2
AGN feedback is responsible for maintaining plasma in global thermal balance in extended halos of elliptical galaxies and galaxy clusters. Local thermal instability in the hot gas…
Chaotic cold accretion in giant elliptical galaxies heated by AGN cosmic rays
Chaoran Wang, Mateusz Ruszkowski, H. -Y. Karen Yang
Black hole feedback plays a central role in shaping the circumgalactic medium (CGM) of elliptical galaxies. We systematically study the impact of plasma physics on the evolution of…
The Impact of Radio AGN Bubble Composition on the Dynamics and Thermal Balance of the Intracluster Medium
H. -Y. K. Yang, M. Gaspari, C. Marlow
Feeding and feedback of active galactic nuclei (AGN) are critical for understanding the dynamics and thermodynamics of the intracluster medium (ICM) within the cores of galaxy clus…
Acoustic Disturbances in Galaxy Clusters
Ellen G. Zweibel, Vladimir V. Mirnov, Mateusz Ruszkowski +3
Galaxy cluster cores are pervaded by hot gas which radiates at far too high a rate to maintain any semblance of a steady state; this is referred to as the cooling flow problem. Of…
Powering of H filaments by cosmic rays
Mateusz Ruszkowski, H. -Y. Karen Yang, Christopher S. Reynolds
Cluster cool cores possess networks of line-emitting filaments. These filaments are thought to originate via uplift of cold gas from cluster centers by buoyant active galactic nucl…
Unveiling the Origin of the Fermi Bubbles
H. -Y. K. Yang, M. Ruszkowski, E. G. Zweibel
The Fermi bubbles, two giant structures above and below the Galactic center (GC), are among the most important discoveries of the Fermi Gamma-ray Space Telescope. Studying their ph…
Impact of Cosmic Ray Transport on Galactic Winds
R. Farber, M. Ruszkowski, H. -Y. K. Yang +1
The role of cosmic rays generated by supernovae and young stars has very recently begun to receive significant attention in studies of galaxy formation and evolution due to the rea…
The Spatially Uniform Spectrum of the Fermi Bubbles: the Leptonic AGN Jet Scenario
H. -Y. K. Yang, M. Ruszkowski
The Fermi bubbles, two giant gamma-ray bubbles above and below the Galactic center (GC), are among the most important findings of the Fermi Gamma-ray Space Telescope. Because of th…
Cosmic ray feedback heating of the intracluster medium
M. Ruszkowski, H. -Y. K. Yang, C. S. Reynolds
Self-regulating AGN feedback in the cool cores of galaxy clusters plays central role in solving the decades-old cooling flow problem, but one major problem remains unsolved - how i…
How AGN Jets Heat the Intracluster Medium -- Insights from Hydrodynamic Simulations
H. -Y. K. Yang, C. S. Reynolds
Feedback from active galactic nuclei (AGN) is believed to prevent catastrophic cooling in galaxy clusters. However, how the feedback energy is transformed into heat, and how the AG…
Global simulations of galactic winds including cosmic ray streaming
Mateusz Ruszkowski, H. -Y. Karen Yang, Ellen Zweibel
Galactic outflows play an important role in galactic evolution. Despite their importance, a detailed understanding of the physical mechanisms responsible for the driving of these w…
Interplay among Cooling, AGN Feedback and Anisotropic Conduction in the Cool Cores of Galaxy Clusters
H. -Y. K. Yang, C. S. Reynolds
Feedback from the active galactic nuclei (AGN) is one of the most promising heating mechanisms to circumvent the cooling-flow problem in galaxy clusters. However, the role of therm…
Fermi bubble simulations: black hole feedback in the Milky Way
M. Ruszkowski, H. -Y. K. Yang, E. Zweibel
The gamma-ray telescope discovered a pair of bubbles at the Galactic center. These structures are spatially-correlated with the microwave emission detected by the WMAP and…
Theoretical Uncertainties due to AGN Subgrid Models in Predictions of Galaxy Cluster Observable Properties
H. -Y. K. Yang, P. M. Sutter, P. M. Ricker
Cosmological constraints derived from galaxy clusters rely on accurate predictions of cluster observable properties, in which feedback from active galactic nuclei (AGN) is a critic…
The Fermi Bubbles: Supersonic AGN Jets with Anisotropic Cosmic Ray Diffusion
H. -Y. K. Yang, M. Ruszkowski, P. M. Ricker +2
The Fermi Gamma-ray Space Telescope reveals two large bubbles in the Galaxy, which extend nearly symmetrically ~50 degrees above and below the Galactic center (GC). Using three-dim…