Solar energetic particle heavy ion properties in the widespread event of 2020 November 29
- Creators
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Mason, G. M.
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Cohen, C. M. S.
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Ho, G. C.
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Mitchell, D. G.
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Allen, R. C.
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Hill, M. E.
- Andrews, G. B.
- Berger, L.
- Boden, S.
- Böttcher, S.
- Cernuda, I.
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Christian, E. R.
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Cummings, A. C.
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Davis, A. J.
- Desai, M. I.
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de Nolfo, G. A.
- Eldrum, S.
- Elftmann, R.
- Kollhoff, A.
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Giacalone, J.
- Gómez-Herrero, R.
- Hayes, J.
- Janitzek, N. P.
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Joyce, C. J.
- Korth, A.
- Kühl, P.
- Kulkarni, S. R.
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Labrador, A. W.
- Espinosa Lara, F.
- Lees, W. J.
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Leske, R. A.
- Mall, U.
- Martin, C.
- Martínez Hellín, A.
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Matthaeus, W. H.
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McComas, D. J.
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McNutt, R. L.
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Mewaldt, R. A.
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Mitchell, J. G.
- Pacheco, D.
- Parra Espada, P.
- Prieto, M.
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Rankin, J. S.
- Ravanbakhsh, A.
- Rodríguez-Pacheco, J.
- Rodríguez Polo, O.
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Roelof, E. C.
- Sánchez-Prieto, S.
- Schlemm, C. E.
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Schwadron, N. A.
- Seifert, H.
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Stone, E. C.
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Szalay, J. R.
- Terasa, J. C.
- Tyagi, K.
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Freiherr von Forstner, J. L.
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Wiedenbeck, M. E.
- Wimmer-Schweingruber, R. F.
- Xu, Z. G.
- Yedla, M.
Abstract
Context. Following a multi-year minimum of solar activity, a solar energetic particle event on 2020 Nov. 29 was observed by multiple spacecraft covering a wide range of solar longitudes including ACE, the Solar Terrestrial Relations Observatory-A, and the recently launched Parker Solar Probe and Solar Orbiter. Aims. Multi-point observations of a solar particle event, combined with remote-sensing imaging of flaring, shocks, and coronal mass ejections allows for a global picture of the event to be synthesized, and made available to the modeling community to test, constrain, and refine models of particle acceleration and transport according to such parameters as shock geometries and particle mass-to-charge ratios. Methods. Detailed measurements of heavy ion intensities, time dependence, fluences, and spectral slopes provided the required test data for this study. Results. The heavy ion abundances, timing, and spectral forms for this event fall well within the range found in prior surveys at 1 au. The spectra were well fitted by broken power law shapes; the Fe/O ratio was somewhat lower than the average of other events. In addition, ³He/⁴He was very low, with only the upper limits established here.
Additional Information
© ESO 2021. Solar Orbiter First Results (Cruise Phase). Received: 13 May 2021 Accepted: 17 June 2021. Solar Orbiter is a mission of international cooperation between ESA and NASA, operated by ESA. The Suprathermal Ion Spectrograph (SIS) is a European facility instrument funded by ESA. We thank ESA and NASA for their support of the Solar Orbiter, PSP, STEREO and ACE missions whose data were used in this Letter. Complete acknowledgements for the missions and specific instruments are too lengthy to include here but are given in the references in Table 1. Solar Orbiter and Parker Solar Probe post-launch work at JHU/APL is supported by NASA contract NNN06AA01C.Attached Files
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Additional details
- Eprint ID
- 112437
- Resolver ID
- CaltechAUTHORS:20211214-82643000
- NNN06AA01C
- NASA
- Created
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2021-12-15Created from EPrint's datestamp field
- Updated
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2022-02-01Created from EPrint's last_modified field
- Caltech groups
- Astronomy Department, Space Radiation Laboratory