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Solar energetic particle heavy ion properties in the widespread event of 2020 November 29

Mason, G. M. and Cohen, C. M. S. and Ho, G. C. and Mitchell, D. G. and Allen, R. C. and Hill, M. E. and Andrews, G. B. and Berger, L. and Boden, S. and Böttcher, S. and Cernuda, I. and Christian, E. R. and Cummings, A. C. and Davis, A. J. and Desai, M. I. and de Nolfo, G. A. and Eldrum, S. and Elftmann, R. and Kollhoff, A. and Giacalone, J. and Gómez-Herrero, R. and Hayes, J. and Janitzek, N. P. and Joyce, C. J. and Korth, A. and Kühl, P. and Kulkarni, S. R. and Labrador, A. W. and Espinosa Lara, F. and Lees, W. J. and Leske, R. A. and Mall, U. and Martin, C. and Martínez Hellín, A. and Matthaeus, W. H. and McComas, D. J. and McNutt, R. L. and Mewaldt, R. A. and Mitchell, J. G. and Pacheco, D. and Parra Espada, P. and Prieto, M. and Rankin, J. S. and Ravanbakhsh, A. and Rodríguez-Pacheco, J. and Rodríguez Polo, O. and Roelof, E. C. and Sánchez-Prieto, S. and Schlemm, C. E. and Schwadron, N. A. and Seifert, H. and Stone, E. C. and Szalay, J. R. and Terasa, J. C. and Tyagi, K. and Freiherr von Forstner, J. L. and Wiedenbeck, M. E. and Wimmer-Schweingruber, R. F. and Xu, Z. G. and Yedla, M. (2021) Solar energetic particle heavy ion properties in the widespread event of 2020 November 29. Astronomy and Astrophysics, 656 . Art. No. L12. ISSN 0004-6361. doi:10.1051/0004-6361/202141310.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Mason, G. M.0000-0003-2169-9618
Cohen, C. M. S.0000-0002-0978-8127
Ho, G. C.0000-0003-1093-2066
Mitchell, D. G.0000-0003-1960-2119
Allen, R. C.0000-0003-2079-5683
Hill, M. E.0000-0002-5674-4936
Christian, E. R.0000-0003-2134-3937
Cummings, A. C.0000-0002-3840-7696
Davis, A. J.0000-0002-9922-8915
de Nolfo, G. A.0000-0002-3677-074X
Giacalone, J.0000-0002-0850-4233
Joyce, C. J.0000-0002-3841-5020
Labrador, A. W.0000-0001-9178-5349
Leske, R. A.0000-0002-0156-2414
Matthaeus, W. H.0000-0001-7224-6024
McComas, D. J.0000-0001-6160-1158
McNutt, R. L.0000-0002-4722-9166
Mewaldt, R. A.0000-0003-2178-9111
Mitchell, J. G.0000-0003-4501-5452
Rankin, J. S.0000-0002-8111-1444
Roelof, E. C.0000-0002-2270-0652
Schwadron, N. A.0000-0002-3737-9283
Stone, E. C.0000-0002-2010-5462
Szalay, J. R.0000-0003-2685-9801
Freiherr von Forstner, J. L.0000-0002-1390-4776
Wiedenbeck, M. E.0000-0002-2825-3128
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.
Group:Astronomy Department, Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:acceleration of particles / Sun: abundances / Sun: flares / Sun: particle emission
Record Number:CaltechAUTHORS:20211214-82643000
Persistent URL:
Official Citation:Solar energetic particle heavy ion properties in the widespread event of 2020 November 29 G. M. Mason, C. M. S. Cohen, G. C. Ho, D. G. Mitchell, R. C. Allen, M. E. Hill, G. B. Andrews, L. Berger, S. Boden, S. Böttcher, I. Cernuda, E. R. Christian, A. C. Cummings, A. J. Davis, M. I. Desai, G. A. de Nolfo, S. Eldrum, R. Elftmann, A. Kollhoff, J. Giacalone, R. Gómez-Herrero, J. Hayes, N. P. Janitzek, C. J. Joyce, A. Korth, P. Kühl, S. R. Kulkarni, A. W. Labrador, F. Espinosa Lara, W. J. Lees, R. A. Leske, U. Mall, C. Martin, A. Martínez Hellín, W. H. Matthaeus, D. J. McComas, R. L. McNutt, R. A. Mewaldt, J. G. Mitchell, D. Pacheco, P. Parra Espada, M. Prieto, J. S. Rankin, A. Ravanbakhsh, J. Rodríguez-Pacheco, O. Rodríguez Polo, E. C. Roelof, S. Sánchez-Prieto, C. E. Schlemm, N. A. Schwadron, H. Seifert, E. C. Stone, J. R. Szalay, J. C. Terasa, K. Tyagi, J. L. Freiherr von Forstner, M. E. Wiedenbeck, R. F. Wimmer-Schweingruber, Z. G. Xu and M. Yedla A&A, 656 (2021) L12 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112437
Deposited By: George Porter
Deposited On:15 Dec 2021 18:34
Last Modified:01 Feb 2022 22:54

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