Search Publications
The multi-spacecraft high-energy solar particle event of 28 October 2021
Vainio, R.; Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F. +15 more
Aims: We studied the first multi-spacecraft high-energy solar energetic particle (SEP) event of solar cycle 25, which triggered a ground level enhancement on 28 October 2021, using data from multiple observers (Parker Solar Probe, STEREO-A, Solar Orbiter, GOES, SOHO, BepiColombo, and the Mars Science Laboratory) that were widely distributed t…
Connecting remote and in situ observations of shock-accelerated electrons associated with a coronal mass ejection
Jebaraj, I. C.; Vainio, R.; Kilpua, E. K. J. +7 more
Context. One of the most prominent sources for energetic particles in our Solar System are huge eruptions of magnetised plasma from the Sun, known as coronal mass ejections (CMEs), which usually drive shocks that accelerate charged particles up to relativistic energies. In particular, energetic electron beams can generate radio bursts through the …
Internal magnetic field structures observed by PSP/WISPR in a filament-related coronal mass ejection
Temmer, M.; Veronig, A. M.; Bothmer, V. +7 more
Context. We investigated the coronal mass ejection (CME) related to an eruptive filament over the southwestern solar limb on December 8, 2022, at around 8 UT. We tracked localized density enhancements reflecting the magnetic structures using white-light data taken with the Wide-field Instrument for Solar PRobe (WISPR) aboard the Parker Solar Probe…
Impact of far-side structures observed by Solar Orbiter on coronal and heliospheric wind simulations
Parenti, S.; Strugarek, A.; Brun, A. S. +4 more
Context. Solar Orbiter is a new space observatory that provides unique capabilities to understand the heliosphere. In particular, it has made several observations of the far-side of the Sun and therefore provides unique information that can greatly improve space weather monitoring.
Aims: In this study, we aim to quantify how the far-side data…
The solar cycle 25 multi-spacecraft solar energetic particle event catalog of the SERPENTINE project
Hayes, L. A.; Vainio, R.; Mitchell, J. G. +26 more
Context. The solar energetic particle analysis platform for the inner heliosphere (SERPENTINE) project, funded through the H2020-SPACE-2020 call of the European Union's Horizon 2020 framework program, employs measurements of the new inner heliospheric spacecraft fleet to address several outstanding questions on the origin of solar energetic partic…
Numerous bidirectionally propagating plasma blobs near the reconnection site of a solar eruption
Chen, Wei; Tian, Hui; Su, Yang +7 more
A current sheet is a common structure involved in solar eruptions. However, it is observed in a minority of the events, and the physical properties of its fine structures during a solar eruption are rarely investigated. Here, we report an on-disk observation that displays 108 compact, circular, or elliptic bright structures, presumably plasma blob…
Unveiling the journey of a highly inclined CME. Insights from the March 13, 2012, event with 110° longitudinal separation
Lario, D.; Jian, L. K.; Temmer, M. +8 more
Context. A fast (∼2000 km s−1) and wide (> 110°) coronal mass ejection (CME) erupted from the Sun on March 13, 2012. Its interplanetary counterpart was detected in situ two days later by STEREO-A and near-Earth spacecraft, such as ACE, Wind, and Cluster. We suggest that at 1 au the CME extended at least 110° in longitude, with Earth …
Eruptive events with exceptionally bright emission in H I Ly-α observed by the Metis coronagraph
Heinzel, P.; Jejčič, S.; Sasso, C. +29 more
Context. Ultraviolet (UV) emission from coronal mass ejections can provide information on the evolution of plasma dynamics, temperature, and elemental composition, as demonstrated by the UV Coronagraph Spectrometer (UVCS) on board the SOlar and Heliospheric Observatory (SOHO). Metis, the coronagraph on board Solar Orbiter, provides for the first t…
Recovery of coronal dimmings
Veronig, A. M.; Podladchikova, T.; Chikunova, G. +2 more
Context. Coronal dimmings are regions of reduced emission in the lower corona observed in the wake of coronal mass ejections (CMEs), representing their footprints. Studying the lifetime evolution of coronal dimmings helps us to better understand the recovery and replenishment of the corona after large-scale eruptions. Aims. We study the recovery o…
Imprint of the magnetic activity cycle on solar asteroseismic characterisation based on 26 years of GOLF and BiSON data
Bétrisey, J.; Farnir, M.; García, R. A. +4 more
Context. Asteroseismic modelling will play a key role in future space-based missions, such as PLATO, CubeSpec, and Roman. Despite remarkable achievements, asteroseismology has revealed significant discrepancies between observations and theoretical predictions of the physics used in stellar models, which have the potential to bias stellar character…