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  3He-rich Solar Energetic Particle Observations at the Parker Solar Probe and near Earth

Wiedenbeck, M. E., Bučík, R., Mason, G. M., Ho, G. C., Leske, R. A., Cohen, C. M. S., et al. (2020). 3He-rich Solar Energetic Particle Observations at the Parker Solar Probe and near Earth. The Astrophysical Journal Supplement Series, 246(2): 42. doi:10.3847/1538-4365/ab5963.

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Wiedenbeck, M. E., Author
Bučík, Radoslav1, Author           
Mason, G. M., Author
Ho, G. C., Author
Leske, R. A., Author
Cohen, C. M. S., Author
Christian, E. R., Author
Cummings, A. C., Author
Davis, A. J., Author
Desai, M. I., Author
Giacalone, J., Author
Haggerty, D. K., Author
Hill, M. E., Author
Joyce, C. J., Author
Labrador, A. W., Author
Malandraki, O., Author
Matthaeus, W. H., Author
McComas, D. J., Author
Jr., R. L. McNutt, Author
Mewaldt, R. A., Author
Mitchell, D. G., AuthorPosner, A., AuthorRankin, J. S., AuthorRoelof, E. C., AuthorSchwadron, N. A., AuthorStone, E. C., AuthorSzalay, J. R., AuthorBale, S. D., AuthorCase, A. W., AuthorKasper, J. C., AuthorKorreck, K. E., AuthorLarson, D. E., AuthorMacDowall, R. J., AuthorPulupa, M., AuthorStevens, M. L., Author more..
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              


Free keywords: Solar energetic particles ; Solar activity ; Solar x-ray flares
 Abstract: The Integrated Science Investigation of the Sun (IS⊙IS) instrument suite on the Parker Solar Probe (PSP) spacecraft is making in situ observations of energetic ions and electrons closer to the Sun than any previous mission. Using data collected during its first two orbits, which reached perihelion distances of 0.17 au, we have searched for 3He-rich solar energetic particle (SEP) events under very quiet solar minimum conditions. On 2019-110–111 (April 20–21), 3He-rich SEPs were observed at energies near 1 MeV nucleon–1 in association with energetic protons, heavy ions, and electrons. This activity was also detected by the Ultra-Low-Energy Isotope Spectrometer and the Electron, Proton, and Alpha Monitor instruments on the Advanced Composition Explorer (ACE) spacecraft located near Earth, 0.99 au from the Sun. At that time, PSP and ACE were both magnetically connected to locations near the west limb of the Sun. Remote sensing measurements showed the presence of type III radio bursts and also helical jets from this region of the Sun. This combination of observations is commonly associated with 3He-rich SEP acceleration on the Sun. AR 12738, which was located at Carrington coordinates from which numerous X-ray flares were observed over a period of more than 6 months, was identified as the source of the 3He-rich events. This region was also the source of several other SEP events detected at PSP or ACE. Aside from the period in 2019 April, IS⊙IS did not observe any other 3He-rich SEPs during orbits 1 and 2.


Language(s): eng - English
 Dates: 2020
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/1538-4365/ab5963
 Degree: -



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Title: The Astrophysical Journal Supplement Series
Source Genre: Journal
Publ. Info: London : IOP Publishing
Pages: - Volume / Issue: 246 (2) Sequence Number: 42 Start / End Page: - Identifier: ISSN: 0067-0049
CoNE: https://pure.mpg.de/cone/journals/resource/954922828211_1