Merging Processes and SZ Effect

Details Merging Processes and SZ Effect Merging Processes and SZ Effect

2004-06-21

arxiv.org/abs/astro-ph/0406461v1

Astronomy and Astrophysics

Astrophysics

to appear in the proceedings of the conference 'Multiwavelength Cosmology', Mykonos Island, Greece, June 2003

Scientific paper

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 $\approx 20 kpc$ up to $\approx 400 kpc$ and Mach numbers between $\mathcal{M}\approx 0.4$ and $\mathcal{M}\approx 1.5$ are observed. In order to analyse the Sunyaev-Zeldovich (SZ) signal, we calculate the modified pressure profile for an ongoing merger.

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