Inflating Fat Bubbles in Clusters of Galaxies by Wide Jets

Details Inflating Fat Bubbles in Clusters of Galaxies by Wide Jets Inflating Fat Bubbles in Clusters of Galaxies by Wide Jets

2006-12-28

arxiv.org/abs/astro-ph/0612760v1

Astrophys.J.656:L5-L8,2007

Astronomy and Astrophysics

Astrophysics

Submitted to ApJ Letters

Scientific paper

10.1086/512122

We conduct two-dimensional hydrodynamical simulations of jets expanding in the intra-cluster medium (ICM). We find that for a fat, i.e. more or less spherical, bubble attached to the center to be formed the jet should have high momentum flux and a large opening angle. Typically, the half opening angle should be >50 degrees, and the large momentum flux requires a jet speed of \~10,000 km/sec. The inflation process involves vortices and local instabilities which mix some ICM with the hot bubble. These results predict that most of the gas inside the bubble has a temperature of 3x10^8

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