Greifswald 2024 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 5: Astrophysics
EP 5.4: Vortrag
Mittwoch, 28. Februar 2024, 15:00–15:15, ELP 1: HS 1.22
ComPol - A Compton polarimeter in a Nanosat — •Matthias Meier1,2, Ion Cojocari3, Carlo Fiorini4, Peter Hindenberger1,2, Philippe Laurent3, Martin Losekamm1,2, Susanne Mertens1,2, Jonas Schlegel1,2, Lorenzo Toscano4, and Michael Willers1,2 — 1Excellence Cluster ORIGINS, Garching, Germany — 2Technical University of Munich, Munich, Germany — 3Alternative Energies and Atomic Energy Commission, Paris, France — 4Polytechnic University of Milan, Milan, Italy
It is hardly possible to resolve the geometry of astrophysical compact objects due to their small size. One way to indirectly learn about their structure are polarization measurements. Especially in the hard X-ray range polarization data is still partially missing. Therefore, the aim of the CubeSat mission ComPol is to fill this gap and to improve the physical model of the black hole binary system Cygnus X-1.
The detector system is composed of a Silicon drift detector (SDD) used as a scatterer and a CeBr3 calorimeter to capture the full Compton kinematics. From the measured interaction points and energies it is possible to perform an event-wise reconstruction and infer the polarization of the initial radiation.
The talk will give an overview of the scientific motivation, the underlying physics and the detector setup.
This research is supported by the Excellence Cluster ORIGINS which is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy - EXC-2094-390783311
Keywords: X-ray; Polarization; Cygnus X-1; CubeSat; Black hole