Characterizing the intracluster light in cosmological hydrodynamic simulations and observations
Daniel Esteban Montenegro-Taborda
We present a study aimed at predicting the intracluster light (ICL) using three photometric methods to separate this light from the central galaxy after masking satellites: a surface brightness cut, a de Vaucouleurs plus excess light decomposition, and a double Sérsic decomposition. For this purpose, post-processed synthetic images were generated from a sample of 40 clusters from the IllustrisTNG-300 simulation. The present study follows the methodology of Kluge et al. (2021) and makes a direct comparison with their observational results. Radial profiles and 2D analyses of the surface brightness of both the observations and the simulations have been produced, from which the ICL fractions have been determined using each of the photometric methods mentioned above. The dependence of the ICL fraction on cluster mass and dynamical state has been analysed. We discuss the implications of the similarities and differences in the ICL fractions found between simulations and observations.
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