Journal Article/Contribution to a conference proceedings/Contribution to a book

PUBDB-2020-00933

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png On the sources of high energy neutrinos

Palladino, A. (Corresponding author)DESY*

2019
SISSA Trieste

This record in other databases:  

Please use a persistent id in citations: doi:10.22323/1.357.0058  doi:10.3204/PUBDB-2020-00933

Abstract: The discovery of a diffuse flux of high energy neutrinos has opened a new era in the field of neutrino astronomy. Up to now only one high energy neutrino has an identified astrophysical counterpart, the blazar TXS 0506+056. However the origin of the diffuse neutrino flux remains still a mystery, even if many possible explanations have been proposed in the last few years. The most natural hypothesis was that high energy neutrinos are produced by blazars, since these powerful objects dominate the γ-ray sky above 100 TeV. However the IceCube stacking limit shows that resolved blazars cannot contribute more than 20\%. Other natural sources are the ones rich of gas, in which the proton-proton interaction dominates. In this scenario an issue would be the over-production of γ-rays associated to neutrinos, if the neutrino spectrum were too soft. In this work we summarize the present knowledge and we discuss the role of low luminosity BL Lacs, showing that it is still possible to power the sub-PeV neutrino flux with blazars. Moreover we also discuss the role of pp sources, showing that they are still into the game and they can saturate the sub-PeV neutrino emission, giving also a contribution larger than 50\% in the energy range between 10 TeV and 100 TeV.

---

Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF3-613) (POF3-613)
2. NEUCOS - Neutrinos and the origin of the cosmic rays (646623) (646623)
3. AUGER2FUTURE - Towards a New Giant Detector for Ultra High Energy Cosmic Rays (328826) (328826)
4. EPLANET - European Particle physics Latin American NETwork (246806) (246806)
5. ASTERICS - Astronomy ESFRI and Research Infrastructure Cluster (653477) (653477)
6. ULTRAS - Ultra-luminous supernovae : understanding their nature and cosmic evolution (291222) (291222)
7. SPCND - Supernovae: Physics and Cosmology in the Next Decade (615929) (615929)
8. imbh - Do intermediate-mass black holes exist? (647208) (647208)
9. Fireworks - Celestial fireworks: revealing the physics of the time-variable sky (725161) (725161)
10. GLORIA - GLObal Robotic telescopes Intelligent Array for e-Science (283783) (283783)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2019

---

Database coverage:
; ; DOAJ Seal

---