Ionisation as indicator for cosmic ray acceleration
- 1Ruhr-Universität Bochum, Fakultät für Physik & Astronomie, Institut für Theoretische Physik IV, 44780 Bochum, Germany
- 2Universität Regensburg, Fakultät für Mathematik, 93040 Regensburg, Germany
Abstract. Astrospheres and wind bubbles of massive stars are believed to be sources of cosmic rays with energies E ≲ 1 TeV. These particles are not directly detectable, but their impact on surrounding matter, in particular ionisation of atomic and molecular hydrogen, can lead to observable signatures. A correlation study of both gamma ray emission, induced by proton-proton interactions of cosmic ray protons with kinetic energies Ep ≥ 280 MeV with ambient hydrogen, and ionisation induced by cosmic ray protons of kinetic energies Ep < 280 MeV can be performed in order to study potential sources of (sub)TeV cosmic rays.