Tsunamis in Galaxy Clusters: Heating of Cool Cores by Acoustic Waves

Abstract

Using an analytical model and numerical simulations, we show that acoustic waves generated by turbulent motion in intracluster medium effectively heat the central region of a so-called ``cooling flow'' cluster. We assume that the turbulence is generated by substructure motion in a cluster or cluster mergers. Our analytical model can reproduce observed density and temperature profiles of a few clusters. We also show that waves can transfer more energy from the outer region of a cluster than thermal conduction alone. Numerical simulations generally support the results of the analytical study.

18 pages, accepted for publication in ApJ

References in corpus (5)

• XMM-Newton observations of the Perseus Cluster I: The temperature and surface brightness structure
• Feedback Heating in Cluster and Galactic Cooling Flows
• Thermal Instability in Clusters of Galaxies with Conduction
• Chandra Observations of the Central Region of Abell 3112
• Problems in suppressing cooling flows in clusters of galaxies by global heat conduction

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• Stable Heating of Cluster Cooling Flows by Cosmic-Ray Streaming
• Possible AGN Shock Heating in the Cool Core Galaxy Cluster Abell 478
• XMM-Newton Observations of A133: A Weak Shock Passing through the Cool Core
• L_X-T Relation and Related Properties of Galaxy Clusters
• Chandra Observation of Abell 2065: An Unequal Mass Merger?
• X-ray Measurement of Dark Matter "Temperature" in Abell 1795
• Can Supermassive Black Holes Sufficiently Heat Cool Cores of Galaxy Clusters?
• The Heated Core of the Radio-Quiet Galaxy Cluster A644
• Merger Hydrodynamics of the Luminous Cluster RXJ1347.5-1145
• Simulating Astro-E2 Observations of Galaxy Clusters: the Case of Turbulent Cores Affected by Tsunamis
• The Origin of Ripples in Cool Cores of Galaxy Clusters: Heating by MHD Waves?
• Collisional interaction limits between dark matters and baryons in `cooling flow' clusters
• The Difficulty of the Heating of Cluster Cooling Flows by Sound Waves and Weak Shocks