Interstellar shock waves and 10Be from ice cores

C. P. Sonett, G. E. Morfill, J. Randy Jokipii

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The anomalously high concentrations of 10Be in Antarctic ice cores1,2, uncorrelated with δ18O, are consistent with an increase in the atmospheric cosmic ray (CR) flux from CR acceleration in propagating interstellar shock waves, which envelop the heliosphere and whose source may be ancient supernovas. This mechanism is an alternative to the model where decreases in geomagnetic field intensity, associated with geomagnetic reversals, periodically enhance the CR flux at the top of the atmosphere. That CR variations attributable to interstellar events such as supernova shock waves have so far not been observed in the CR record is a long-standing issue 3-5. If our interpretation of the 10Be spikes is correct, it marks the first such observation. The possibility that 'direct' observation of the interstellar medium can be made using the 10Be record would be an important adjunct to the study of cosmic rays in the interstellar medium.

Original languageEnglish (US)
Pages (from-to)458-460
Number of pages3
JournalNature
Volume330
Issue number6147
StatePublished - 1987

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shock wave
ice core
cosmic ray
magnetic reversal
geomagnetic field
ice
atmosphere

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Sonett, C. P., Morfill, G. E., & Jokipii, J. R. (1987). Interstellar shock waves and 10Be from ice cores. Nature, 330(6147), 458-460.

Interstellar shock waves and 10Be from ice cores. / Sonett, C. P.; Morfill, G. E.; Jokipii, J. Randy.

In: Nature, Vol. 330, No. 6147, 1987, p. 458-460.

Research output: Contribution to journalArticle

Sonett, CP, Morfill, GE & Jokipii, JR 1987, 'Interstellar shock waves and 10Be from ice cores', Nature, vol. 330, no. 6147, pp. 458-460.
Sonett CP, Morfill GE, Jokipii JR. Interstellar shock waves and 10Be from ice cores. Nature. 1987;330(6147):458-460.
Sonett, C. P. ; Morfill, G. E. ; Jokipii, J. Randy. / Interstellar shock waves and 10Be from ice cores. In: Nature. 1987 ; Vol. 330, No. 6147. pp. 458-460.
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