Diffuse Emission of Galactic High-Energy Neutrinos from a Global Fit of Cosmic Rays
Update: 2022-11-30
Description
Diffuse Emission of Galactic High-Energy Neutrinos from a Global Fit of Cosmic Rays by Georg Schwefer et al. on Wednesday 30 November
In the standard picture of galactic cosmic rays, a diffuse flux of
high-energy gamma-rays and neutrinos is produced from inelastic collisions of
cosmic ray nuclei with the interstellar gas. The neutrino flux is a guaranteed
signal for high-energy neutrino observatories such as IceCube, but has not been
found yet. Experimental searches for this flux constitute an important test of
the standard picture of galactic cosmic rays. Both the observation and
non-observation would allow important implications for the physics of cosmic
ray acceleration and transport. We present DINECRAFT, a new model of galactic
diffuse high-energy gamma-rays and neutrinos, fitted to recent cosmic ray data
from AMS-02, DAMPE, IceTop as well as KASCADE. We quantify the uncertainties
for the predicted emission from the cosmic ray model, but also from the choice
of source distribution, gas maps and cross-sections. We consider the
possibility of a contribution from unresolved sources. Our model predictions
exhibit significant deviations from older models. Our fiducial model is
available at https://doi.org/10.5281/zenodo.7373010 .
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.15607v1
In the standard picture of galactic cosmic rays, a diffuse flux of
high-energy gamma-rays and neutrinos is produced from inelastic collisions of
cosmic ray nuclei with the interstellar gas. The neutrino flux is a guaranteed
signal for high-energy neutrino observatories such as IceCube, but has not been
found yet. Experimental searches for this flux constitute an important test of
the standard picture of galactic cosmic rays. Both the observation and
non-observation would allow important implications for the physics of cosmic
ray acceleration and transport. We present DINECRAFT, a new model of galactic
diffuse high-energy gamma-rays and neutrinos, fitted to recent cosmic ray data
from AMS-02, DAMPE, IceTop as well as KASCADE. We quantify the uncertainties
for the predicted emission from the cosmic ray model, but also from the choice
of source distribution, gas maps and cross-sections. We consider the
possibility of a contribution from unresolved sources. Our model predictions
exhibit significant deviations from older models. Our fiducial model is
available at https://doi.org/10.5281/zenodo.7373010 .
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.15607v1
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