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Shocks driven by coronal mass ejections (CMEs) are the most powerful accelerators of gradual solar energetic particles (SEPs) in the inner heliosphere. On 2023 March 13, a halo CME, as seen from the Solar Heliospheric Observatory (SoHO) and…

Solar energetic protons (SEPs) in different energy channels from 10 to above 100 MeV are analyzed and their relationship to solar and geomagnetic activity is investigated. We performed temporal association analysis between the SEPs, solar…

太阳与恒星天体物理 · 物理学 2025-12-19 Rositsa Miteva , Susan W. Samwel , Svetoslav Zabunov

We present a new empirical model to predict solar energetic particle (SEP) event-integrated and peak intensity spectra between 10 and 130 MeV at 1 AU, based on multi-point spacecraft measurements from the Solar TErrestrial RElations…

太阳与恒星天体物理 · 物理学 2021-02-24 Alessandro Bruno , Ian G. Richardson

Context. Impulsive solar energetic particle events in the inner heliosphere show the long-lasting enrichment of 3He. Aims. We study the source regions of long-lasting 3He-rich solar energetic particle (SEP) events Methods. We located the…

太阳与恒星天体物理 · 物理学 2015-07-22 Nai-hwa Chen , Radoslav. Bucik , Davina. E. Innes , Glenn. M. Mason

We present the implementation of coupling the EUropean Heliospheric FORcasting Information Asset (EUHFORIA) and the improved Particle Acceleration and Transport in the Heliosphere (iPATH) model and simulate the widespread solar energetic…

空间物理 · 物理学 2022-12-07 Zheyi Ding , Nicolas Wijsen , Gang Li , Stefaan Poedts

Forecasting large Solar Energetic Particle (SEP) events associated with shocks driven by fast coronal mass ejections (CME) pose a major difficulty in the field of Space Weather. Besides issues associated with CME initiation, the SEP…

太阳与恒星天体物理 · 物理学 2019-08-19 J. Martin Laming , J. Dan Moses , Yuan-Kuen Ko , Chee K. Ng , Cara E. Rakowski , Allan J. Tylka

We investigate multi-spacecraft observations of the January 17, 2010 solar energetic particle event. Energetic electrons and protons have been observed over a remarkable large longitudinal range at the two STEREO spacecraft and SOHO…

太阳与恒星天体物理 · 物理学 2016-11-11 Nina Dresing , Raúl Gómez-Herrero , Andreas Klassen , Bernd Heber , Yulia Kartavykh , Wolfgang Dröge

We investigate the acceleration source of the impulsive solar energetic particle (SEP) events on 2007 January 24. Combining the in situ electron measurements and remote-sensing solar observations, as well as the calculated magnetic fields…

太阳与恒星天体物理 · 物理学 2013-05-27 C. Li , S. A. Matthews , L. van Driel-Gesztelyi , J. Sun , C. J. Owen

We have statistically analyzed a set of 115 low frequency (Deca- Hectometer wavelengths range) type II and type III bursts associated with major Solar Energetic Particle (SEP: Ep > 10 MeV) events and their solar causes such as solar flares…

太阳与恒星天体物理 · 物理学 2020-07-14 P. Pappa Kalaivani , A. Shanmugaraju , O. Prakash , R. -S. Kim

The origin of 3He abundance enhancements in coronal mass ejection (CME)-driven shock gradual solar energetic particle (SEP) events remains largely unexplained. Two mechanisms have been suggested - the re-acceleration of remnant flare…

The processes responsible for the acceleration of solar energetic particles (SEPs) are still not well understood, including whether SEP electrons and protons are accelerated by common or separate processes. Using a numerical particle…

太阳与恒星天体物理 · 物理学 2023-07-05 R. D. Strauss , N. Dresing , I. G. Richardson , J. P. van den Berg , P. J. Steyn

Solar energetic particles (SEPs) are an important space radiation source, especially for the space weather environment in the inner heliosphere. The energy spectrum of SEP events is crucial both for evaluating their radiation effects and…

太阳与恒星天体物理 · 物理学 2024-10-18 Yubao Wang , Jingnan Guo

Multi-spacecraft observations are used to study the in-situ effects of a large CME erupting from the farside of the Sun on 3 November 2011, with particular emphasis on the associated solar energetic particle (SEP) event. At that time both…

太阳与恒星天体物理 · 物理学 2013-12-12 A. J. Prise , L. K. Harra , S. A. Matthews , D. M. Long , A. D. Aylward

The solar corona below 10 solar radii is an important region for early acceleration and transport of solar energetic particles (SEPs) by coronal mass ejection-driven shock waves. There, these waves propagate into a highly variable dynamic…

太阳与恒星天体物理 · 物理学 2022-02-15 Kamen Kozarev , Mohamed Nedal , Rositsa Miteva , Momchil Dechev , Pietro Zucca

Particles measured in large gradual solar energetic particle (SEP) events are believed to be predominantly accelerated at shocks driven by coronal mass ejections (CMEs). Ion charge state and composition analyses suggest that the origin of…

Solar eruptions generally refer to coronal mass ejections (CMEs) and flares. Both are important sources of space weather. Solar flares cause sudden change in the ionization level in the ionosphere. CMEs cause solar energetic particle (SEP)…

太阳与恒星天体物理 · 物理学 2017-09-12 Nat Gopalswamy

Solar energetic particle (SEP) events are one of the most crucial aspects of space weather. Their prediction depends on various factors including the source solar eruptions such as flares and coronal mass ejections (CMEs). The Geostationary…

太阳与恒星天体物理 · 物理学 2023-08-16 Sumanth A. Rotti , Petrus C. Martens

We review recent work on 111 Fe-rich impulsive solar energetic ($\sim$ 3 MeV/nuc) particle (SEP) events observed from 1994 to 2013. Strong elemental abundance enhancements scale with A/Q, the ion mass-to-charge ratio, as (A/Q)$^{\alpha}$,…

太阳与恒星天体物理 · 物理学 2015-10-01 Stephen Kahler , Donald Reames , Edward Cliver

It is thought that solar energetic ions associated with coronal/interplanetary shock waves are accelerated to high energies by the diffusive shock acceleration mechanism. For this mechanism to be efficient, intense magnetic turbulence is…

太阳与恒星天体物理 · 物理学 2023-11-29 A. Afanasiev , R. Vainio , D. Trotta , S. Nyberg , N. Talebpour Sheshvan , H. Hietala , N. Dresing

In this work, we examine the association between solar active regions and 152 solar flares, coronal mass ejections, and solar energetic particle (SEP) events over solar cycles 23-24 (1997-2017). The CDAW center's GOES data in the energy…

太阳与恒星天体物理 · 物理学 2025-04-21 Raj Kumar , Ramesh Chandra , Bimal Pande , Seema Pande