Spectrally resolved cosmic rays in galaxy simulations

Discussion timeslot (ZOOM-Meeting): 15. July 2021 - 12:00
ZOOM-Meeting URL: https://desy.zoom.us/j/91896950007
ZOOM-Meeting ID: 91896950007
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/14-CRs-and-ISM-CRD/45
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-06/7

Abstract:
'We investigate the dynamical effects of cosmic rays (CRs) in isolated disc galaxies. CRs are included as a non-thermal component in the advection-diffusion approximation and are dynamically coupled to the gas in the magneto-hydrodynamical simulations. The CRs are spectrally resolved with a full spectrum ranging from sub-GeV to TeV in every computational cell. We can therefore account for energy-dependent losses and include an energy-dependent diffusive transport in every cell. We show the differences between a grey CR approximation and our new spectrally resolved CRs concerning galactic outflows and gamma ray mock observations. We highlight, where the steady state approximation for CR spectra is a valid approach as well as where and now strongly the spectra vary spatially in different regions of the galaxy and temporally over the course of several Gyr.'

Authors: Philipp Girichidis
Indico-ID: 1420
Proceeding URL: https://pos.sissa.it/395/180