Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shielding
An understanding of how the heliosphere modulates galactic cosmic ray (GCR) fluxes and spectra is important, not only for studies of their origin, acceleration and propagation in our galaxy, but also for predicting their effects (on technology and on the Earth's environment and organisms) and f...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2004-12-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/22/4381/2004/angeo-22-4381-2004.pdf |
| _version_ | 1819263210216226816 |
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| author | A. Rouillard M. Lockwood M. Lockwood |
| author_facet | A. Rouillard M. Lockwood M. Lockwood |
| author_sort | A. Rouillard |
| collection | DOAJ |
| description | An understanding of how the heliosphere modulates galactic cosmic ray (GCR) fluxes and spectra is important, not only for studies of their origin, acceleration and propagation in our galaxy, but also for predicting their effects (on technology and on the Earth's environment and organisms) and for interpreting abundances of cosmogenic isotopes in meteorites and terrestrial reservoirs. In contrast to the early interplanetary measurements, there is growing evidence for a dominant role in GCR shielding of the total open magnetic flux, which emerges from the solar atmosphere and enters the heliosphere. In this paper, we relate a strong 1.68-year oscillation in GCR fluxes to a corresponding oscillation in the open solar magnetic flux and infer cosmic-ray propagation paths confirming the predictions of theories in which drift is important in modulating the cosmic ray flux.<br><br>
<b>Key words.</b> Interplanetary physics (Cosmic rays, Interplanetary
magnetic fields) |
| first_indexed | 2024-12-23T20:09:58Z |
| format | Article |
| id | doaj.art-0d9cb480410c49139d2ba37509e58054 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-23T20:09:58Z |
| publishDate | 2004-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-0d9cb480410c49139d2ba37509e580542022-12-21T17:32:49ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762004-12-01224381439510.5194/angeo-22-4381-2004Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shieldingA. Rouillard0M. Lockwood1M. Lockwood2Department of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UKRutherford Appleton Laboratory, Chilton, OX11 0QX, UKDepartment of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UKAn understanding of how the heliosphere modulates galactic cosmic ray (GCR) fluxes and spectra is important, not only for studies of their origin, acceleration and propagation in our galaxy, but also for predicting their effects (on technology and on the Earth's environment and organisms) and for interpreting abundances of cosmogenic isotopes in meteorites and terrestrial reservoirs. In contrast to the early interplanetary measurements, there is growing evidence for a dominant role in GCR shielding of the total open magnetic flux, which emerges from the solar atmosphere and enters the heliosphere. In this paper, we relate a strong 1.68-year oscillation in GCR fluxes to a corresponding oscillation in the open solar magnetic flux and infer cosmic-ray propagation paths confirming the predictions of theories in which drift is important in modulating the cosmic ray flux.<br><br> <b>Key words.</b> Interplanetary physics (Cosmic rays, Interplanetary magnetic fields)https://www.ann-geophys.net/22/4381/2004/angeo-22-4381-2004.pdf |
| spellingShingle | A. Rouillard M. Lockwood M. Lockwood Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shielding Annales Geophysicae |
| title | Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shielding |
| title_full | Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shielding |
| title_fullStr | Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shielding |
| title_full_unstemmed | Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shielding |
| title_short | Oscillations in the open solar magnetic flux with a period of 1.68 years: imprint on galactic cosmic rays and implications for heliospheric shielding |
| title_sort | oscillations in the open solar magnetic flux with a period of 1 68 years imprint on galactic cosmic rays and implications for heliospheric shielding |
| url | https://www.ann-geophys.net/22/4381/2004/angeo-22-4381-2004.pdf |
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