An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 1 Search : UHECR puzzle
UHECR puzzle
  چیستان ِ پرتوهای ِ کیهانی ِ اولتر-مه-کاروژ   
cistân-e partowhâ-ye keyhâni-ye ultar-meh-kâruž

Fr.: énigme des rayons cosmiques de très haute énergie   

The question of the origin and nature of the → ultra high energy cosmic rays. According to the → GZK cutoff, the UHECRs should be nearby. They are expected to be exceptional, therefore visible by some astrophysical counterpart. However, there is nothing visible (within a few tens of → Mpc) in the direction of all the UHECR detected up to now.

UHECR; → puzzle.