Recent observations reveal detailed structures of mergers in galaxy clusters. Moving cold fronts could be identified as remnants of subclusters. They are believed to mark the late stage of a merging process. Dynamics, geometry and extension of the subclusters can be very different: Spherically shaped bodies with a radius of ≈20kpc up to ≈400kpc and Mach numbers between M≈0.4 and M≈1.5 are observed. In order to analyse the Sunyaev-Zeldovich (SZ) signal, we calculate the modified pressure profile for an ongoing merger.
@article{arxiv.astro-ph/0406461,
title = {Merging Processes and SZ Effect},
author = {P. M. Koch and Ph. Jetzer},
journal= {arXiv preprint arXiv:astro-ph/0406461},
year = {2007}
}
Comments
to appear in the proceedings of the conference 'Multiwavelength Cosmology', Mykonos Island, Greece, June 2003