Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-09-21
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
1 table, 10 figures, 29 pages. Accepted at ApJ. Figures with better quality are available at ApJ online
Scientific paper
Recent observations by Chandra and XMM-Newton indicate there are complex structures at the cores of galaxy clusters, such as cavities and filaments. One plausible model for the formation of such structures is the interaction of radio jets with the intracluster medium (ICM). To investigate this idea, we use three-dimensional magnetohydrodynamic simulations including anisotropic (Braginskii) viscosity to study the effect of magnetic fields on the evolution and morphology of buoyant bubbles in the ICM. We investigate a range of different initial magnetic field geometries and strengths, and study the resulting x-ray surface brightness distribution for comparison to observed clusters. Magnetic tension forces and viscous transport along field lines tend to suppress instabilities parallel, but not perpendicular, to field lines. Thus, the evolution of the bubble depends strongly on the initial field geometry. We find toroidal field loops initially confined to the interior of the bubble are best able reproduce the observed cavity structures.
Dong Ruobing
Stone James M.
No associations
LandOfFree
Buoyant Bubbles in Intracluster Gas: Effects of Magnetic Fields and Anisotropic Viscosity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Buoyant Bubbles in Intracluster Gas: Effects of Magnetic Fields and Anisotropic Viscosity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Buoyant Bubbles in Intracluster Gas: Effects of Magnetic Fields and Anisotropic Viscosity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-299886