Temporal Evolution of Heavy-Ion Spectra in Solar Energetic Particle Events
Temporal Evolution of Heavy-Ion Spectra in Solar Energetic Particle Events
复制标题
太阳高能粒子事件中重离子光谱的时间演化
DOI:
10.1007/s11207-019-1431-9
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发表时间:
2019
期刊:
影响因子:
2.8
通讯作者:
Doran D
中科院分区:
文献类型:
--
作者:
Doran D
Solar energetic particles (SEPs) are released into the heliosphere by solar flares and coronal mass ejections (CMEs). They are mostly protons, with smaller amounts of heavy ions from helium to iron, and lesser amounts of species heavier than iron. The spectra of heavy ions have been previously studied mostly by using the fluence of the particles in an event-integrated spectrum in a small number of spectral snapshots. In this article, we analyze the temporal evolution of the heavy-ion spectra using two large SEP events (27 January 2012 and 7 January 2014) from theSolar TErrestrial Relations Observatory(STEREO) era usingAdvanced Composition Explorer(ACE)Solar Isotope Spectrometer(SIS) andUltra Low Energy Isotope Spectrometer(ULEIS),Energetic Particles: Acceleration, Composition and Transport(EPACT) onboardWind, and the STEREO-A (Ahead) and -B (Behind)Low-Energy Telescope(LET) andSuprathermal Ion Telescope(SIT) instruments, taking a large number of snapshots covering the temporal evolution of the event. We find large differences in the spectra of the ions after the main flux enhancement in terms of the grouping of similar species, but also in terms of the location of the instruments. Although it is somewhat less noticeable than in the case of the temporal evolution of protons (Doran and Dalla,Solar Phys.291, 2071, 2016), we observe a wave-like pattern travelling through the heavy ion spectra from the highest energies to the lowest, creating an “arch” structure that later straightens into a power law after 18 to 24 hours.
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影响因子:
2.8
作者:
S. Dalla;A. Balogh;S. Krucker;A. Posner;R. Müller;J. Anglin;M. Y. Hofer;R. Marsden;T. Sanderson;B. Heber;Ming Zhang;R. B. Mckibben
通讯作者:
R. B. Mckibben
影响因子:
3.7
作者:
N. Crosby;D. Heynderickx;P. Jiggens;À. Aran;B. Sanahuja;P. Truscott;F. Lei;C. Jacobs;S. Poedts;S. Gabriel;I. Sandberg;A. Glover;A. Hilgers
通讯作者:
A. Hilgers
影响因子:
2.8
作者:
D. Doran;S. Dalla
通讯作者:
S. Dalla
DOI:
10.1051/0004-6361/201527801
发表时间:
2015-08
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
作者:
T. Laitinen;A. Kopp;F. Effenberger;S. Dalla;M. Institute;U. C. Lancashire;Preston;UK.;
通讯作者:
T. Laitinen;A. Kopp;F. Effenberger;S. Dalla;M. Institute;U. C. Lancashire;Preston;UK.;
影响因子:
2.8
作者:
A. Shanmugaraju;Y. Moon;B. Vršnak
通讯作者:
B. Vršnak