The Origin of Ripples in Cool Cores of Galaxy Clusters: Heating by MHD Waves?
arXiv:astro-ph/0703053 · doi:10.1086/516823
Abstract
We consider MHD waves as a heating source of cool cores of galaxy clusters. In particular, we focus on transverse waves (Alfven waves), because they can propagate a longer distance than longitudinal waves (sound waves). Using MHD simulations, we found that the transverse waves can stably heat a cool core if the wave period is large enough (>~ 10^8 yr). Moreover, the longitudinal waves that are created as a by-product of the nonlinear evolution of the transverse waves could be observed as the 'ripples' found in cool cores.
arXiv commentAccepted for publication in ApJL
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