Signatures of nearby supernova in cosmic ray data
Event details
Date | 19.03.2018 |
Hour | 14:00 › 15:30 |
Speaker | Dmitri Semikoz (APC Paris, Moscow) |
Location | |
Category | Conferences - Seminars |
In this talk I will show that standard static model of galactic cosmic rays
suggested in 1990th is in direct contradiction with large number of modern
observations, which include measured variability of cosmic ray flux in Galaxy,
magnetic field measurements and large number of anomalies in local cosmic ray
observations. I will present new model of galactic cosmic rays,
which takes into account anisotropic propagation of cosmic rays
and explain multiple anomalies in the cosmic ray data
by adding the effects of a 2 million year old nearby supernova.
In particular, this supernova can explain the excess of positrons
and antiprotons above 20 GeV found by PAMELA and AMS-02, the discrepancy in the slopes
of the spectra of cosmic ray protons and heavier nuclei in the TeV-PeV energy range
and the plateau in cosmic ray dipole anisotropy in the 2-50 TeV energy range.
Same supernova was responsible for Fe60 measured in ocean crust.
Practical information
- General public
- Free