AD 775 pulse of cosmogenic radionuclides production as imprint of a Galactic gamma-ray burst

We suggest an explanation of a sharp increase in the abundance of cosmogenic radiocarbon found in tree rings dated AD 775. The increase could originate from high-energy irradiation of the atmosphere by a Galactic gamma-ray burst. We argue that, unlike a cosmic ray event, a gamma-ray burst does not n...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2013-11, Vol.435 (4), p.2878-2884
Main Authors: Pavlov, A. K., Blinov, A. V., Konstantinov, A. N., Ostryakov, V. M., Vasilyev, G. I., Vdovina, M. A., Volkov, P. A.
Format: Article
Language:English
Subjects:
Astrophysics
Gamma ray astronomy
Protons
Star & galaxy formation
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Summary:We suggest an explanation of a sharp increase in the abundance of cosmogenic radiocarbon found in tree rings dated AD 775. The increase could originate from high-energy irradiation of the atmosphere by a Galactic gamma-ray burst. We argue that, unlike a cosmic ray event, a gamma-ray burst does not necessarily result in a substantial increase in long-lived 10Be atmospheric production. At the same time, the 36Cl nuclide would be generated in the amounts detectable in the corresponding ice-core samples from Greenland and Antarctica. These peculiar features allow experimental discrimination of nuclide effects caused by gamma-ray bursts and by powerful proton events.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stt1468