175 citations · 802 across the 28 of their papers we have counts for
11 papers · 1 filter
The distribution function of dark matter in massive haloes
Radoslaw Wojtak, Ewa L. Lokas, Gary A. Mamon +3
We study the distribution function (DF) of dark matter particles in haloes of mass range 10^{14}--10^{15}\Msun. In the numerical part of this work we measure the DF for a sample of…
Mass modelling of Abell 2634: avoiding the interloper bias
Radoslaw Wojtak, Ewa L. Lokas
Using an example of the Abell 2634 galaxy cluster we discuss the effect of contamination of kinematic data by interlopers and its impact on mass modelling. The cluster data reveal…
The effect of unbound stars on the mass modelling of the Fornax dwarf
Ewa L. Lokas, Jaroslaw Klimentowski, Radoslaw Wojtak
We discuss how different approaches to selecting member stars in kinematic samples of dwarf spheroidal galaxies affect the estimates of their mass and anisotropy of stellar orbits.…
Mass modelling of galaxy clusters via velocity moments
Ewa L. Lokas, Radoslaw Wojtak, Gary A. Mamon +1
We summarize the method of mass modelling of galaxy clusters based on reproducing the dispersion and kurtosis of the projected velocity distribution of galaxies. The models are par…
The importance of interloper removal in galaxy clusters: saving more objects for the Jeans analysis
Radoslaw Wojtak, Ewa L. Lokas
We study the effect of contamination by interlopers in kinematic samples of galaxy clusters. We demonstrate that without the proper removal of interlopers the inferred parameters o…
Interloper treatment in dynamical modelling of galaxy clusters
Radoslaw Wojtak, Ewa L. Lokas, Gary A. Mamon +3
The aim of this paper is to study the efficiency of different approaches to interloper treatment in dynamical modelling of galaxy clusters. Using cosmological N-body simulation of…