MSc defense by Jacob Svensmark – University of Copenhagen

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MSc defense by Jacob Svensmark

 Effect of asphericity in caustic mass estimates of galaxy clusters

Supervisor: Steen H. Hansen

Abstract: When trying to determine the mass of a galaxy cluster, often spherical assumptions must be made about its shape. Clusters are however generally not spherical, which turns out to introduce significant error into the mass estimates - up to a factor of 3! Viewing clusters from N-body simulations as 3D-ellipsoids and taking into account their surrounding filaments turns out to explain most of the observed error in masses, at least using a particular mass estimation technique known as "the caustic technique".

Read the thesis here>>