Signatures of nearby supernova in cosmic ray data

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Event details

Date 19.03.2018
Hour 14:0015:30
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

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