Was the C14 elevation in 775 CE caused by a Superflare?

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Abstract

The 14C production of shock-accelerated particles is calculated in terms of the total energy released in energetic particles. The recently reported 1.2% jump in the 14C content of the atmosphere in the year C.E. 775, it is found, would require more than 1033 erg in energetic particles, less than first estimates but far more than any known solar flare on record. It is noted that the superflare from a large comet (comparable to C/Hale-Bopp) colliding with the sun could produce shock-accelerated GeV cosmic rays in the solar corona and/or solar wind, and possibly account for the CE 775 event. Such events are in any case inevitable in our solar system. Several additional predictions of cometary encounters with the sun and other stars may be observable in the future.

Original languageEnglish
Title of host publicationProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
PublisherSociedade Brasileira de Fisica
ISBN (Electronic)9788589064293
StatePublished - 1 Jan 2013
Event33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil
Duration: 2 Jul 20139 Jul 2013

Publication series

NameProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
Volume2013-October

Conference

Conference33rd International Cosmic Rays Conference, ICRC 2013
Country/TerritoryBrazil
CityRio de Janeiro
Period2/07/139/07/13

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