Search Publications
Statistical investigation of decayless oscillations in small-scale coronal loops observed by Solar Orbiter/EUI
Van Doorsselaere, Tom; Lim, Daye; Berghmans, David +6 more
Decayless kink oscillations are omnipresent in the solar atmosphere, and they are a viable candidate for coronal heating. Although there have been extensive studies of decayless oscillations in coronal loops with lengths of a few hundred megameters, the properties of these oscillations in small-scale (∼10 mm) loops are yet to be explored. In this …
Localising pulsations in the hard X-ray and microwave emission of an X-class flare
Krucker, Säm; Polito, Vanessa; Yu, Sijie +5 more
Aims: The aim of this work is to identify the mechanism driving pulsations in hard X-ray (HXR) and microwave emission during solar flares. Using combined HXR and microwave observations from Solar Orbiter/STIX and EOVSA, we investigate an X1.3 GOES class flare, 2022-03-30T17:21:00, which displays pulsations on timescales evolving from ∼7 s in …
Modelling two energetic storm particle events observed by Solar Orbiter using the combined EUHFORIA and iPATH models
Li, Gang; Poedts, Stefaan; Kouloumvakos, Athanasios +6 more
Context. By coupling the EUropean Heliospheric FORcasting Information Asset (EUHFORIA) and the improved Particle Acceleration and Transport in the Heliosphere (iPATH) models, we model two energetic storm particle (ESP) events originating from the same active region (AR 13088) and observed by Solar Orbiter (SolO) on August 31, 2022, and September 5…
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 …
Small-scale magnetic flux emergence preceding a chain of energetic solar atmospheric events
Rouppe van der Voort, L. H. M.; Joshi, R.; Froment, C. +4 more
Context. Advancements in instrumentation have revealed a multitude of small-scale extreme-ultraviolet (EUV) events in the solar atmosphere and considerable effort is currently undergoing to unravel them.
Aims: Our aim is to employ high-resolution and high-sensitivity magnetograms to gain a detailed understanding of the magnetic origin of such…
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…
Spectroscopic evidence of cool plasma in quiet Sun small-scale brightenings detected by HRIEUV on board Solar Orbiter
Parenti, S.; Bocchialini, K.; Dolliou, A.
Context. A large number of small and short-lived EUV brightenings have been detected in the quiet Sun (QS) over the past three years by the High Resolution Imager of the Extreme Ultraviolet Imager (HRIEUV) on board Solar Orbiter. It remains uncertain whether these events reach coronal temperatures and, thus, whether they directly contribute to cor…
A first rapid synoptic magnetic field map using SDO/HMI and SO/PHI data
Schmidt, W.; Woch, J.; Solanki, S. K. +47 more
Context. Traditionally, the observation time needed to build synoptic maps of the solar magnetic field is bound to the 27 days of a full Carrington rotation due to the single viewpoint from Earth.
Aims: Our aim is to reduce this observation time to 13.5 days by combining magnetograms from two vantage points, 180° apart in longitude in the ide…
Investigating coronal loop morphology and dynamics from two vantage points
Teriaca, Luca; Solanki, Sami K.; Schühle, Udo +9 more
Coronal loops are the fundamental building blocks of the solar corona. Therefore, comprehending their properties is essential in unraveling the dynamics of the upper solar atmosphere. In this study, we conduct a comparative analysis of the morphology and dynamics of a coronal loop observed from two different spacecraft: the High Resolution Imager …