The high-energy Sun - probing the origins of particle acceleration on our nearest star
The high-energy Sun - probing the origins of particle acceleration on our nearest star
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高能太阳 - 探索离我们最近的恒星上粒子加速的起源
DOI:
10.1007/s10686-021-09798-6
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发表时间:
2021
影响因子:
3
通讯作者:
Matthews S
中科院分区:
文献类型:
--
作者:
Matthews S
As a frequent and energetic particle accelerator, our Sun provides us with an excellent astrophysical laboratory for understanding the fundamental process of particle acceleration. The exploitation of radiative diagnostics from electrons has shown that acceleration operates on sub-second time scales in a complex magnetic environment, where direct electric fields, wave turbulence, and shock waves all must contribute, although precise details are severely lacking. Ions were assumed to be accelerated in a similar manner to electrons, but γ-ray imaging confirmed that emission sources are spatially separated from X-ray sources, suggesting distinctly different acceleration mechanisms. Current X-ray and γ-ray spectroscopy provides only a basic understanding of accelerated particle spectra and the total energy budgets are therefore poorly constrained. Additionally, the recent detection of relativistic ion signatures lasting many hours, without an electron counterpart, is an enigma. We propose a single platform to directly measure the physical conditions present in the energy release sites and the environment in which the particles propagate and deposit their energy. To address this fundamental issue, we set out a suite of dedicated instruments that will probe both electrons and ions simultaneously to observe; high (seconds) temporal resolution photon spectra (4 keV – 150 MeV) with simultaneous imaging (1 keV – 30 MeV), polarization measurements (5–1000 keV) and high spatial and temporal resolution imaging spectroscopy in the UV/EUV/SXR (soft X-ray) regimes. These instruments will observe the broad range of radiative signatures produced in the solar atmosphere by accelerated particles.
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DOI:
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发表时间:
1987
期刊:
影响因子:
--
作者:
X. Hua;R. Lingenfelter
通讯作者:
R. Lingenfelter
DOI:
10.1086/165477
发表时间:
1987-08
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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通讯作者:
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DOI:
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发表时间:
2016
期刊:
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1086/309841
发表时间:
1995
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1086/505329
发表时间:
2006
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
G. Hurford;S. Krucker;R. Lin;Richard A. Schwartz;G. Share;David M. Smith
通讯作者:
David M. Smith