A Simple Measurement of Turbulence in Cores of Galaxy Clusters

Details A Simple Measurement of Turbulence in Cores of Galaxy Clusters A Simple Measurement of Turbulence in Cores of Galaxy Clusters

2005-08-10

arxiv.org/abs/astro-ph/0508249v1

Astrophys.J.631:L17-L20,2005

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJL

Scientific paper

10.1086/496972

Using a simple model, we study the effects of turbulence on the motion of bubbles produced by AGN jet activities in the core of a galaxy cluster. We focus on the turbulence with scales larger then the size of the bubbles. We show that for a bubble pair with an age of ~10^8 yr, the projected angle between the two vectors from the cluster center to the two bubbles should be ~> 90 degree and the ratio of their projected distances from the cluster center should be ~< 2.5, if the velocity and scale of the turbulence are ~250 km s^-1 and ~20 kpc, respectively. The positions of the bubbles observed in the Perseus cluster suggest that the turbulent velocity is ~>100 km s^-1 for the cluster.

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