Sound Waves Excitation by Jet-Inflated Bubbles in Clusters of Galaxies

Details Sound Waves Excitation by Jet-Inflated Bubbles in Clusters of Galaxies Sound Waves Excitation by Jet-Inflated Bubbles in Clusters of Galaxies

2008-08-17

arxiv.org/abs/0808.2294v1

Astronomy and Astrophysics

Astrophysics

submitted to MNRAS

Scientific paper

10.1111/j.1365-2966.2009.14566.x

We show that repeated sound waves in the intracluster medium (ICM) can be excited by a single inflation episode of an opposite bubble pair. To reproduce this behavior in numerical simulations the bubbles should be inflated by jets, rather than being injected artificially. The multiple sound waves are excited by the motion of the bubble-ICM boundary that is caused by vortices inside the inflated bubbles and the backflow (`cocoon') of the ICM around the bubble. These sound waves form a structure that can account for the ripples observed in the Perseus cooling flow cluster. We inflate the bubbles using slow massive jets, with either a wide opening angle or that are precessing. The jets are slow in the sense that they are highly sub-relativistic, $v_j \sim 0.01c-0.1c$, and they are massive in the sense that the pair of bubbles carry back to the ICM a large fraction of the cooling mass, i.e., $\sim 1-50 M_\odot \yr^{-1}$. We use a two-dimensional axisymmetric (referred to as 2.5D) hydrodynamical numerical code (VH-1).

Affiliated with

Also associated with

No associations

Rating

Sound Waves Excitation by Jet-Inflated Bubbles in Clusters of Galaxies 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 Sound Waves Excitation by Jet-Inflated Bubbles in Clusters of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sound Waves Excitation by Jet-Inflated Bubbles in Clusters of Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-580879