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Small 3He-rich solar energetic particle (SEP) events have been commonly associated with extreme-ultraviolet (EUV) jets and narrow coronal mass ejections (CMEs) which are believed to be the signatures of magnetic reconnection involving field…

Solar and Stellar Astrophysics · Physics 2016-12-14 Radoslav Bucik , Davina E. Innes , Glenn M. Mason , Mark E. Wiedenbeck

High-energy particles were recorded by near-Earth spacecraft and ground-based neutron monitors (NMs) on 2012 May 17. This event was the first ground level enhancement (GLE) of solar cycle 24. In this study, we try to identify the…

Solar and Stellar Astrophysics · Physics 2013-05-27 C. Li , Kazi A. Firoz , L. P. Sun , L. I. Miroshnichenko

Context: Coronal mass ejections (CMEs) are eruptions of plasma from the Sun that travel through interplanetary space and may encounter Earth. CMEs often enclose a magnetic flux rope (MFR), the orientation of which largely determines the…

Solar and Stellar Astrophysics · Physics 2023-05-17 Vincent E. Ledvina , Erika Palmerio , Christina Kay , Nada Al-Haddad , Pete Riley

This article is the second of a series of articles aiming at proving the feasibility of the forecast of all the most relevant classical atmospherical parameters for astronomical applications (wind speed and direction, temperature, relative…

Instrumentation and Methods for Astrophysics · Physics 2013-09-27 Franck Lascaux , Elena Masciadri , Luca Fini

The capability to predict the parameters of an SEP event such as its onset, peak flux, and duration is critical to assessing any potential space weather impact. We present a new flexible modelling system simulating the propagation of Solar…

Solar and Stellar Astrophysics · Physics 2015-06-01 M. S. Marsh , S. Dalla , M. Dierckxsens , T. Laitinen , N. B. Crosby

Solar energetic particles (SEPs) associated with flares and/or coronal mass ejection (CME)-driven shocks can impose acute radiation hazards to space explorations. To measure energetic particles in near-Mars space, the Mars Energetic…

Using ion measurements from Ultra-Low-Energy Isotope Spectrometer (ULEIS) observations onboard Advanced Composition Explorer (ACE) and Solar Isotope Spectrometer (SIS) observations onboard the Solar Terrestrial Observatory (STEREO)-A and…

Solar and Stellar Astrophysics · Physics 2022-11-30 Samuel T. Hart , Maher A. Dayeh , Radoslav Bučík , Mihir I. Desai , Robert W. Ebert , George C. Ho , Gang Li , Glenn M. Mason

This work presents a set of optimal machine learning (ML) models to represent the temporal degradation suffered by the power conversion efficiency (PCE) of polymeric organic solar cells (OSCs) with a multilayer structure…

An outstanding problem in heliospheric physics is understanding the acceleration of solar energetic particles (SEP) in coronal mass ejections (CMEs) and flares. A fundamental question is whether the acceleration occurs in interplanetary…

Solar and Stellar Astrophysics · Physics 2019-10-09 Kamen Kozarev , Maher A. Dayeh , Ashraf Farahat

Energetic particle instruments on board GPS satellites form a powerful global prompt proton sensor network (GPPSn) that provides an unprecedented opportunity to monitor and characterize solar energetic protons targeting the Earth. The…

Space Physics · Physics 2020-07-08 Yue Chen , Steven K. Morley , Matthew R. Carver

We study the solar energetic particle (SEP) event associated with the 2012 July 23 extreme solar storm, for which STEREO and the spacecraft at L1 provide multi-point remote sensing and in situ observations. The extreme solar storm, with a…

Solar and Stellar Astrophysics · Physics 2016-08-31 Bei Zhu , Ying D. Liu , Janet G. Luhmann , Huidong Hu , Rui Wang , Zhongwei Yang

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…

Space Physics · Physics 2022-12-07 Zheyi Ding , Nicolas Wijsen , Gang Li , Stefaan Poedts

The trajectories of Solar Energetic Particles (SEPs) in an Interplanetary Magnetic Field (IMF) exhibiting large-scale fluctuations due to footpoint motions originating in the photosphere, are simulated using a full-orbit test-particle code.…

Solar and Stellar Astrophysics · Physics 2015-06-04 James Kelly , Silvia Dalla , Timo Laitinen

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…

Solar and Stellar Astrophysics · Physics 2021-02-17 Raj Kumar , Ramesh Chandra , Bimal Pande , Seema Pande

The Cluster mission, launched in 2000, has produced a large database of electron flux intensity measurements in the Earths magnetosphere by the Research with Adaptive Particle Imaging Detector (RAPID)/ Imaging Electron Spectrometer (IES)…

Stellar photospheric activity is known to limit the detection and characterisation of extra-solar planets. In particular, the study of Earth-like planets around Sun-like stars requires data analysis methods that can accurately model the…

Earth and Planetary Astrophysics · Physics 2023-01-06 J. D. Camacho , J. P. Faria , P. T. P. Viana

This study addresses the prediction of geomagnetic disturbances by exploiting machine learning techniques. Specifically, the Long-Short Term Memory recurrent neural network, which is particularly suited for application over long time…

Coronal mass ejections (CMEs) and solar energetic particles (SEPs) are two phenomena that can cause severe space weather effects throughout the heliosphere. The evolution of CMEs, especially in terms of their magnetic structure, and the…

Surface enhanced Raman scattering (SERS) in nanoscale hotspots has been placed great hopes upon for identification of minimum chemical traces and in-situ investigation of single molecule structures and dynamics. However, previous work…

Optics · Physics 2016-09-19 Jing Long , Hui Yi , Hongquan Li , Tian Yang

Ground Level Enhancement (GLE) events provide rare opportunities to study high-energy solar particle acceleration through direct detection of secondary radiation at ground level. On November 11, 2025, the Aragats Solar Neutron Telescope…

Solar and Stellar Astrophysics · Physics 2025-12-10 A. Chilingarian , B. Sargsyan , L. Kozliner , T. Karapetyan