Relics as Probes of Galaxy Cluster Mergers |
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| Authors: | R J van Weeren M Brüggen H J A Röttgering M Hoeft |
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| Institution: | 1.Leiden Observatory,Leiden University,Leiden,The?Netherlands;2.Jacobs University Bremen,Bremen,Germany;3.Thüringer Landessternwarte Tautenburg,Tautenburg,Germany |
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| Abstract: | Galaxy clusters grow by mergers with other clusters and galaxy groups. These mergers create shocks within the intracluster
medium (ICM). It is proposed that particles can be accelerated to extreme energies within the shocks. In the presence of a
magnetic field these particles should then form large regions emitting synchrotron radiation, creating the so-called radio
relics. An example of a cluster with relics is CIZA J2242.8+5301. Here we present hydrodynamical simulations of idealized
binary cluster collisions with the aim of constraining the merger scenario for this cluster. We conclude that by using the
location, size and width of double radio relics we can set constraints on the mass ratios, impact parameters, time scales,
and viewing geometries of binary cluster merger events. |
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