A Simple Measurement of Turbulence in Cores of Galaxy Clusters | Zendy

Yutaka Fujita | Zendy

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A Simple Measurement of Turbulence in Cores of Galaxy Clusters

Author(s) -

Yutaka Fujita

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/496972

Subject(s) - turbulence , simple (philosophy) , astrophysics , galaxy , environmental science , physics , meteorology , philosophy , epistemology

Using a simple model, we study the effects of turbulence on the motion ofbubbles produced by AGN jet activities in the core of a galaxy cluster. Wefocus on the turbulence with scales larger then the size of the bubbles. Weshow that for a bubble pair with an age of ~10^8 yr, the projected anglebetween 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 centershould be ~< 2.5, if the velocity and scale of the turbulence are ~250 km s^-1and ~20 kpc, respectively. The positions of the bubbles observed in the Perseuscluster suggest that the turbulent velocity is ~>100 km s^-1 for the cluster.Comment: Accepted for publication in ApJ

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