TY - JOUR
T1 - Strong magnetization measured in the cool cores of galaxy clusters
AU - Reiss, Ido
AU - Keshet, Uri
PY - 2014/8/14
Y1 - 2014/8/14
N2 - Tangential discontinuities, seen as x-ray edges known as cold fronts (CFs), are ubiquitous in cool-core galaxy clusters. We analyze all 17 deprojected CF thermal profiles found in the literature, including three new CFs we tentatively identify (in clusters A2204 and 2A0335). We discover small but significant thermal pressure drops below all nonmerger CFs, and argue that they arise from strong magnetic fields below and parallel to the discontinuity, carrying 10%-20% of the pressure. Such magnetization can stabilize the CFs, and explain the CF-radio minihalo connection.
AB - Tangential discontinuities, seen as x-ray edges known as cold fronts (CFs), are ubiquitous in cool-core galaxy clusters. We analyze all 17 deprojected CF thermal profiles found in the literature, including three new CFs we tentatively identify (in clusters A2204 and 2A0335). We discover small but significant thermal pressure drops below all nonmerger CFs, and argue that they arise from strong magnetic fields below and parallel to the discontinuity, carrying 10%-20% of the pressure. Such magnetization can stabilize the CFs, and explain the CF-radio minihalo connection.
UR - http://www.scopus.com/inward/record.url?scp=84940269811&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.113.071302
DO - 10.1103/PhysRevLett.113.071302
M3 - Article
C2 - 25170697
AN - SCOPUS:84940269811
SN - 0031-9007
VL - 113
JO - Physical Review Letters
JF - Physical Review Letters
IS - 7
M1 - 071302
ER -