STUDY OF SOLAR ENERGETIC PARTICLE ASSOCIATIONS WITH CORONAL EXTREME-ULTRAVIOLET WAVES

被引:20
作者
Park, Jinhye [1 ]
Innes, D. E. [2 ]
Bucik, R. [2 ,3 ]
Moon, Y. -J. [1 ,4 ]
Kahler, S. W. [5 ]
机构
[1] Kyung Hee Univ, Dept Astron & Space Sci, Yongin 446701, South Korea
[2] Max Planck Inst Solar Syst Res, D-37077 Gottingen, Germany
[3] Max Planck Princeton Ctr Plasma Phys, Princeton, NJ 08540 USA
[4] Kyung Hee Univ, Sch Space Res, Yongin 446701, South Korea
[5] Air Force Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA
关键词
Sun: activity; Sun: coronal mass ejections (CMEs); Sun: magnetic fields; Sun: particle emission; SOHO/EIT OBSERVATIONS; MASS EJECTION; MEV PROTONS; ACCELERATION; EVENTS; INJECTION; FRONTS; ORIGIN;
D O I
10.1088/0004-637X/808/1/3
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the relationship between large gradual solar energetic particle (SEP) events and associated extreme-ultraviolet (EUV) wave properties in 16 events that occurred between 2010 August and 2013 May and were observed by SDO, the Solar and Heliospheric Observatory (SOHO), and/or STEREO. We determine onset times, peak times, and peak fluxes of the SEP events in the SOHO/ERNE and STEREO/LET proton channels (6-10 MeV). The EUV wave arrival times and their speeds from the source sites to the spacecraft footpoints in the photosphere, which are magnetically connected to the spacecraft by Parker spiral and potential fields, are determined by spacetime plots from the full-Sun heliographic images created by combining STEREO-A and STEREO-B 195 angstrom and SDO 193 angstrom images. The SEP peak fluxes increase with the EUV wave speeds, and the SEP spectral indices become harder with the speeds. This shows that higher energetic particle fluxes are associated with faster EUV waves, which are considered as the lateral expansions of coronal-mass-ejection-driven shocks in the low corona.
引用
收藏
页数:10
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