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相关论文: Acceleration and propagation of Solar Energetic Pa…

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Solar energetic particle (SEP) events have been observed by the Parker Solar Probe (PSP) spacecraft since its launch in 2018. These events include sources from solar flares and coronal mass ejections (CMEs). Onboard PSP is the IS\(\odot\)IS…

Solar Energetic Particles (SEPs) form a critical component of Space Weather. The complex, intertwined dynamics of SEP sources, acceleration, and transport make their forecasting very challenging. Yet, information about SEP arrival and their…

太阳与恒星天体物理 · 物理学 2024-11-26 Maher A. Dayeh , Subhamoy Chatterjee , Andres Munoz-Jaramillo , Kimberly Moreland , Hazel M. Bain , Samuel Hart

In solar energetic particle (SEP) events, the physical processes of both shock acceleration and scattering during transport can cause energy-spectral indices to be correlated with enhancement or suppression of element abundances versus…

太阳与恒星天体物理 · 物理学 2021-01-29 Donald V. Reames

This paper updates the influence of environmental and source factors of shocks driven by coronal mass ejections (CMEs) that are likely to influence the solar energetic particle (SEP) events. The intensity variation due to CME interaction…

太阳与恒星天体物理 · 物理学 2015-05-30 Nat Gopalswamy

Interplanetary Coronal Mass Ejection (ICME) shocks are known to accelerate particles and contribute significantly to Solar Energetic Particle (SEP) events. We have performed Magnetohydrodynamic-Particle in Cell (MHD-PIC) simulations of ICME…

太阳与恒星天体物理 · 物理学 2021-12-22 Shanwlee Sow Mondal , Aveek Sarkar , Bhargav Vaidya , Andrea Mignone

Insights into the processes of Solar Energetic Particle (SEP) propagation are essential for understanding how solar eruptions affect the radiation environment of near-Earth space. SEP propagation is influenced by turbulent magnetic fields…

太阳与恒星天体物理 · 物理学 2018-01-11 T. Laitinen , F. Effenberger , A. Kopp , S. Dalla

We probe the spectral hardening of solar flares emission in view of associated solar proton events (SEPs) at earth and coronal mass ejection (CME) acceleration as a consequence. In this investigation we undertake 60 SEPs of the Solar Cycle…

太阳与恒星天体物理 · 物理学 2013-10-22 Sharad C Tripathi , Parvaiz A Khan , Aslam A M , A K Gwal , P K Purohit , Rajmal Jain

The Sun, as an active star, is the driver of energetic phenomena that structure interplanetary space and affect planetary atmospheres. The effects of Space Weather on Earth and the solar system is of increasing importance as human…

太阳与恒星天体物理 · 物理学 2021-07-14 Manuela Temmer

The study of the solar energetic particle events (SEPs) and their association with solar flares and other activities are very crucial to understand the space weather. Keeping this in view, in this paper, we present the study of the SEPs…

太阳与恒星天体物理 · 物理学 2021-02-17 Raj Kumar , Ramesh Chandra , Bimal Pande , Seema Pande

We study solar energetic particle (SEP) events during multiple solar eruptions. The analysed sequences, on 24-26 November 2000, 9-13 April 2001, and 22-25 August 2005, consisted of halo-type coronal mass ejections (CMEs) that originated…

太阳与恒星天体物理 · 物理学 2015-12-16 Silja Pohjolainen , Firas Al-Hamadani , Eino Valtonen

Gradual solar energetic particle (SEP) events, usually attributed to shock waves driven by coronal mass ejections (CMEs), show a wide variety of temporal behaviors. For example, TO, the >10 MeV proton onset time with respect to the launch…

太阳与恒星天体物理 · 物理学 2023-03-29 Kosuke Kihara , Ayumi Asai , Seiji Yashiro , Nariaki V. Nitta

Mitigating risks posed by solar energetic particles (SEPs) to operations and exploration in space and Earth's atmosphere motivates the development of advanced, synergistic approaches for monitoring, modeling, and analyzing space weather…

Gradual solar energetic particle (SEP) events are generally attributed to the particle acceleration in shock waves driven by coronal mass ejections (CMEs). Space-weather effects of such events are important, so there has been continuous…

太阳与恒星天体物理 · 物理学 2024-12-17 Alexandr Afanasiev , Nicolas Wijsen , Rami Vainio

We revisit the full variety of observed temporal and spatial distributions of energetic solar protons in "gradual" solar energetic-particle (SEP) events resulting from the spatial variations in the shock waves that accelerate them.…

太阳与恒星天体物理 · 物理学 2023-02-16 Donald V. Reames

Solar flares are the largest energy-release events in the Solar System, allowing us to study fundamental physical phenomena under extreme conditions. Those include magnetic reconnection, particle acceleration, radiation transport, and…

Solar eruptive events such as flares and coronal mass ejection (CME)-driven shocks can release solar energetic particles (SEPs) into the heliosphere. The heliospheric current sheet (HCS) is a large-scale structure that separates regions of…

太阳与恒星天体物理 · 物理学 2026-04-22 C. Han , R. F. Wimmer-Schweingruber , P. Kühl , L. Berger , Z. Ding , A. Kollhoff , Q. Shi , Z. Xu , M. Qin , M. Wang

Solar Energetic Particles (SEPs) possess a high destructive potential as they pose multiple radiation hazards on Earth and onboard spacecrafts. The present work continues a series started with the paper by Borovikov et al.(2018) describing…

空间物理 · 物理学 2019-11-27 D. Borovikov , I. V. Sokolov , Z. Huang , I. I. Roussev , T. I. Gombosi

Observations relating the characteristics of electrons seen near Earth (SEPs) and those producing flare radiation show that in certain (prompt) events the origin of both population appears to be the flare site, which show strong correlation…

太阳与恒星天体物理 · 物理学 2016-10-12 Vahe' Petrosian

Coronal mass ejections (CMEs) are thought to drive collisionless shocks in the solar corona, which in turn have been shown capable of accelerating solar energetic particles (SEPs) in minutes. It has been notoriously difficult to extract…

太阳与恒星天体物理 · 物理学 2015-06-19 Kamen A. Kozarev , John C. Raymond , Vasili V. Lobzin , Michael Hammer

Fast interplanetary coronal mass ejections (interplanetary CMEs, or ICMEs) are the drivers of strongest space weather storms such as solar energetic particle events and geomagnetic storms. The connection between space weather impacting…

太阳与恒星天体物理 · 物理学 2017-03-15 Takuya Takahashi , Kazunari Shibata