Bonn 2020 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 3: Poster session

EP 3.3: Poster

Dienstag, 31. März 2020, 16:30–18:30, Zelt

ComPol - A CubeSat Compton Telescope — •Matthias Meier — Max-Planck-Institut für Physik, München

Astrophysical objects with a large mass-to-size ratio are referred to as compact objects, e.g. black holes, white dwarfs, neutron stars. Many questions concerning these astrophysical objects are still not answered. Besides optical measurements X-ray and gamma ray survey are essential to improve the understanding of these objects. The objective of the CubeSat mission ComPol is to investigate the black hole binary Cygnus X-1 for one year. The goal is to improve its physical model by measuring spectrum and polarization in the hard X-ray range (20 keV to 2 MeV). The information about the polarization can be extracted from the kinematics of Compton scattering.

The destined detector system is a Compton telescope made up of two detector layers. The first detector layer, a Silicon Drift Detector (SDD), acts as a scatterer for the incoming photons which are subsequently absorbed in the second layer, a crystalline CeBr3 calorimeter. The SDD has been primarily developed for the TRISTAN project, a planned detector upgrade of the KATRIN experiment, to search for sterile neutrinos.

The poster presents the status of the currently ongoing design study for the detector set-up and the estimated sensitivity to detect polarization in an energy range from 20 keV to 300 keV. An outlook to the technical realization and the CubeSat launch will be given.

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