Speaker
Description
High-energy gamma-ray sources can be produced away from the supernova remnant (SNR), due to diffused hadronic cosmic-rays interacting with the interstellar medium (ISM). In order to find the corresponding accelerator, one possible approach is the modelling of gamma-ray emission from this process. The observation of gamma-ray sources can then be compared with the obtained model. In modelling, the gamma-ray emission is very different depending on the location of the interstellar gas clouds in relation to the cosmic rays. However, currently there is no accurate method which can determine the clouds' exact position. Iteration over the positions of the clouds is then necessary to determine a more precise position that produces strong matching between the observed and modelled gamma-ray emission. The volume pixels belonging to each cloud will be determined using clustering which groups a set of data based on similarity. In this talk, I will present the preliminary algorithm developed for clustering the ISM using dendrograms. This was applied to an example region of a well-studied SNR, W28, which I will use to demonstrate the influence of moving the clouds on the modelled gamma-ray emission.
