Bonn 2020 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 11: Astrophysics I

EP 11.2: Talk

Thursday, April 2, 2020, 16:45–17:00, H-HS VIII

Automated Imaging of VLBI Data for Morphology Studies of TeV Radio Galaxies — •Yvonne Kasper and Kevin Schmidt — TU Dortmund

An identified source for cosmic rays are Active Galactic Nuclei (AGN), which accelerate particles in large relativistic outflows (jets). To understand their acceleration mechanisms, the characteristics and morphologies of the sources are studied. Well suited targets are TeV radio galaxies, since very high energy gamma ray emission as well as a extended jet structure can be observed at the same time. This makes these sources excellent candidates for multi-wavelength studies, in which information from different wavelengths are combined. Observations with radio interferometers like the Very Long Baseline Array allow to resolve the morphologies of TeV radio galaxies. To get reproducible images from the obtained data, it is necessary to have fast and reliable imaging software. In this talk, we present results of imaging the TeV radio galaxy IC310 with the WS-Clean imager by André Offringa. The optimal cleaning parameters are acquired by a grid search approach, where the produced images are scored by the level and the occurrence of structures in the remaining noise of the image.