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Title: SOLAR SOURCES OF {sup 3}He-RICH SOLAR ENERGETIC PARTICLE EVENTS IN SOLAR CYCLE 24

Abstract

Using high-cadence EUV images obtained by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory, we investigate the solar sources of 26 {sup 3}He-rich solar energetic particle events at ≲1 MeV nucleon{sup −1} that were well-observed by the Advanced Composition Explorer during solar cycle 24. Identification of the solar sources is based on the association of {sup 3}He-rich events with type III radio bursts and electron events as observed by Wind. The source locations are further verified in EUV images from the Solar and Terrestrial Relations Observatory, which provides information on solar activities in the regions not visible from the Earth. Based on AIA observations, {sup 3}He-rich events are not only associated with coronal jets as emphasized in solar cycle 23 studies, but also with more spatially extended eruptions. The properties of the {sup 3}He-rich events do not appear to be strongly correlated with those of the source regions. As in the previous studies, the magnetic connection between the source region and the observer is not always reproduced adequately by the simple potential field source surface model combined with the Parker spiral. Instead, we find a broad longitudinal distribution of the source regions extending well beyond the westmore » limb, with the longitude deviating significantly from that expected from the observed solar wind speed.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Lockheed Martin Advanced Technology Center, Dept/A021S, B/252, 3251 Hanover Street, Palo Alto, CA 94304 (United States)
  2. Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723 (United States)
  3. Institute of Space Physics and Applied Technology, Peking University, Beijing 100871 (China)
  4. California Institute of Technology, Pasadena, CA 91125 (United States)
Publication Date:
OSTI Identifier:
22522248
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 806; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ERUPTION; HELIUM 3; IMAGES; JETS; LIMBS; MAGNETIC FIELDS; MEV RANGE; SOLAR CYCLE; SOLAR ELECTRONS; SOLAR NEUTRONS; SOLAR PROTONS; SOLAR WIND; SUN; SURFACES; ULTRAVIOLET RADIATION; VELOCITY

Citation Formats

Nitta, Nariaki V., Mason, Glenn M., Wang, Linghua, Cohen, Christina M. S., and Wiedenbeck, Mark E., E-mail: nitta@lmsal.com, E-mail: glenn.mason@jhuapl.edu, E-mail: wanglhwang@gmail.com, E-mail: cohen@srl.caltech.edu, E-mail: mark.e.wiedenbeck@jpl.nasa.gov. SOLAR SOURCES OF {sup 3}He-RICH SOLAR ENERGETIC PARTICLE EVENTS IN SOLAR CYCLE 24. United States: N. p., 2015. Web. doi:10.1088/0004-637X/806/2/235.
Nitta, Nariaki V., Mason, Glenn M., Wang, Linghua, Cohen, Christina M. S., & Wiedenbeck, Mark E., E-mail: nitta@lmsal.com, E-mail: glenn.mason@jhuapl.edu, E-mail: wanglhwang@gmail.com, E-mail: cohen@srl.caltech.edu, E-mail: mark.e.wiedenbeck@jpl.nasa.gov. SOLAR SOURCES OF {sup 3}He-RICH SOLAR ENERGETIC PARTICLE EVENTS IN SOLAR CYCLE 24. United States. https://doi.org/10.1088/0004-637X/806/2/235
Nitta, Nariaki V., Mason, Glenn M., Wang, Linghua, Cohen, Christina M. S., and Wiedenbeck, Mark E., E-mail: nitta@lmsal.com, E-mail: glenn.mason@jhuapl.edu, E-mail: wanglhwang@gmail.com, E-mail: cohen@srl.caltech.edu, E-mail: mark.e.wiedenbeck@jpl.nasa.gov. 2015. "SOLAR SOURCES OF {sup 3}He-RICH SOLAR ENERGETIC PARTICLE EVENTS IN SOLAR CYCLE 24". United States. https://doi.org/10.1088/0004-637X/806/2/235.
@article{osti_22522248,
title = {SOLAR SOURCES OF {sup 3}He-RICH SOLAR ENERGETIC PARTICLE EVENTS IN SOLAR CYCLE 24},
author = {Nitta, Nariaki V. and Mason, Glenn M. and Wang, Linghua and Cohen, Christina M. S. and Wiedenbeck, Mark E., E-mail: nitta@lmsal.com, E-mail: glenn.mason@jhuapl.edu, E-mail: wanglhwang@gmail.com, E-mail: cohen@srl.caltech.edu, E-mail: mark.e.wiedenbeck@jpl.nasa.gov},
abstractNote = {Using high-cadence EUV images obtained by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory, we investigate the solar sources of 26 {sup 3}He-rich solar energetic particle events at ≲1 MeV nucleon{sup −1} that were well-observed by the Advanced Composition Explorer during solar cycle 24. Identification of the solar sources is based on the association of {sup 3}He-rich events with type III radio bursts and electron events as observed by Wind. The source locations are further verified in EUV images from the Solar and Terrestrial Relations Observatory, which provides information on solar activities in the regions not visible from the Earth. Based on AIA observations, {sup 3}He-rich events are not only associated with coronal jets as emphasized in solar cycle 23 studies, but also with more spatially extended eruptions. The properties of the {sup 3}He-rich events do not appear to be strongly correlated with those of the source regions. As in the previous studies, the magnetic connection between the source region and the observer is not always reproduced adequately by the simple potential field source surface model combined with the Parker spiral. Instead, we find a broad longitudinal distribution of the source regions extending well beyond the west limb, with the longitude deviating significantly from that expected from the observed solar wind speed.},
doi = {10.1088/0004-637X/806/2/235},
url = {https://www.osti.gov/biblio/22522248}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 806,
place = {United States},
year = {Sat Jun 20 00:00:00 EDT 2015},
month = {Sat Jun 20 00:00:00 EDT 2015}
}