Early 18th century cosmic ray flux inferred from 44Ti in Agen meteorite

C. Taricco; N. Sinha; N. Bhandari; P. Colombetti; S. Mancuso; S. Rubinetti; D. Barghini

doi:10.1007/s10509-016-2909-7

Early 18th century cosmic ray flux inferred from ⁴⁴Ti in Agen meteorite

C. Taricco, N. Sinha, N. Bhandari, P. Colombetti, S. Mancuso, S. Rubinetti, D. Barghini

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

We report the measurement of radioactivity of cosmogenic ⁴⁴Ti in Agen meteorite, a H5 chondrite that fell in 1814. The ⁴⁴Ti activity in meteorites is related to centennial-scale changes in cosmic ray intensity caused by heliospheric magnetic field modulation in the interplanetary space between heliocentric distances of 1 and 3 AU. The measured low ⁴⁴Ti activity in Agen suggests a strong modulation of galactic cosmic rays at the turn of the 18th century, resulting in a low cosmic ray flux and is consistent with the linearly decreasing trend of GCR flux, modulated by the Gleissberg solar cycle during the past 250 years, as previously suggested by us.

Lingua originale	Inglese
Numero di articolo	338
Rivista	Astrophysics and Space Science
Volume	361
Numero di pubblicazione	10
DOI	https://doi.org/10.1007/s10509-016-2909-7
Stato di pubblicazione	Pubblicato - 1 ott 2016
Pubblicato esternamente	Sì

Accesso al documento

10.1007/s10509-016-2909-7

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title = "Early 18th century cosmic ray flux inferred from 44Ti in Agen meteorite",

abstract = "We report the measurement of radioactivity of cosmogenic 44Ti in Agen meteorite, a H5 chondrite that fell in 1814. The 44Ti activity in meteorites is related to centennial-scale changes in cosmic ray intensity caused by heliospheric magnetic field modulation in the interplanetary space between heliocentric distances of 1 and 3 AU. The measured low 44Ti activity in Agen suggests a strong modulation of galactic cosmic rays at the turn of the 18th century, resulting in a low cosmic ray flux and is consistent with the linearly decreasing trend of GCR flux, modulated by the Gleissberg solar cycle during the past 250 years, as previously suggested by us.",

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author = "C. Taricco and N. Sinha and N. Bhandari and P. Colombetti and S. Mancuso and S. Rubinetti and D. Barghini",

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T1 - Early 18th century cosmic ray flux inferred from 44Ti in Agen meteorite

AU - Taricco, C.

AU - Sinha, N.

AU - Bhandari, N.

AU - Colombetti, P.

AU - Mancuso, S.

AU - Rubinetti, S.

AU - Barghini, D.

PY - 2016/10/1

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N2 - We report the measurement of radioactivity of cosmogenic 44Ti in Agen meteorite, a H5 chondrite that fell in 1814. The 44Ti activity in meteorites is related to centennial-scale changes in cosmic ray intensity caused by heliospheric magnetic field modulation in the interplanetary space between heliocentric distances of 1 and 3 AU. The measured low 44Ti activity in Agen suggests a strong modulation of galactic cosmic rays at the turn of the 18th century, resulting in a low cosmic ray flux and is consistent with the linearly decreasing trend of GCR flux, modulated by the Gleissberg solar cycle during the past 250 years, as previously suggested by us.

AB - We report the measurement of radioactivity of cosmogenic 44Ti in Agen meteorite, a H5 chondrite that fell in 1814. The 44Ti activity in meteorites is related to centennial-scale changes in cosmic ray intensity caused by heliospheric magnetic field modulation in the interplanetary space between heliocentric distances of 1 and 3 AU. The measured low 44Ti activity in Agen suggests a strong modulation of galactic cosmic rays at the turn of the 18th century, resulting in a low cosmic ray flux and is consistent with the linearly decreasing trend of GCR flux, modulated by the Gleissberg solar cycle during the past 250 years, as previously suggested by us.

KW - Cosmogenic radionuclides

KW - Meteorites

KW - Solar activity—methods: gamma-ray spectrometry

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