Investigations of Flaring Plasma Parameters during an M-class Flare Using the Differential Evolution Method and XSM/Chandrayaan-2 Observations by Anna Kępa, Marek Siarkowski, Arun Kumar Awasthi, Janusz Sylwester, Barbara Sylwester

“…Additionally, utilizing data from the Spectrometer Telescope for Imaging X-rays on board the Solar Orbiter, we investigate the evolution of hard X-ray source morphology, source volume, electron density, and thermal behavior of the flaring plasma throughout the event. …”
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X-Ray and Spectral Ultraviolet Observations of Periodic Pulsations in a Solar Flare Fan/Looptop by Ryan J. French, Laura A. Hayes, Maria D. Kazachenko, Katharine K. Reeves, Chengcai Shen, Juraj Lörinčík

“…The ≈50 s oscillations are observed near in-phase by Solar Orbiter/STIX, GOES, and IRIS Fe xxi intensity, Doppler, and nonthermal velocity. …”
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Progress in Global Helioseismology: A New Light on the Solar Modeling Problem and Its Implications for Solar-Like Stars by Gaël Buldgen, Gaël Buldgen, Gaël Buldgen, Sébastien Salmon, Arlette Noels

“…Data of unprecedented quality were obtained through the implementation of networks of ground-based observatories such as the GONG project or the BiSON network, coupled with space-based telescopes such as SOHO and SDO missions and more data is expected from the Solar Orbiter mission. Besides the improvement of observational data, solar seismologists developed sophisticated techniques to infer the internal structure of the Sun from its eigenfrequencies. …”
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Relative Yield of Thermal and Nonthermal Emission during Weak Flares Observed by STIX during 2021 September 20–25 by Arun Kumar Awasthi, Tomasz Mrozek, Sylwester Kołomański, Michalina Litwicka, Marek Stęślicki, Karol Kułaga

“…During 2021 September 20–25, the Solar Orbiter mission—being closer to the Sun (∼0.6 au) and having a moderate separation angle (<40°) from the Sun–Earth line—offered a unique opportunity to analyze multiwavelength emission from ∼200 (mostly weak) flares, commonly observed by the Spectrometer Telescope for Imaging X-rays (STIX), STEREO-A, GOES, and the Solar Dynamics Observatory. …”
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Origin of the Unusual Composition of 3He-rich Solar Energetic Particles by Radoslav Bučík, Glenn M. Mason, Sargam M. Mulay, George C. Ho, Robert F. Wimmer-Schweingruber, Javier Rodríguez-Pacheco

“…We examine ^3 He-rich solar energetic particles (SEPs) detected on 2023 October 24–25 by Solar Orbiter at 0.47 au. Measurements reveal that heavy-ion enhancements increase irregularly with mass, peaking at S. …”
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Formation of a Magnetic Cloud from the Merging of Two Successive Coronal Mass Ejections by Chong Chen, Ying D. Liu, Bei Zhu, Huidong Hu, Rui Wang

“…We investigate the propagation and interaction properties of the two CMEs correlated with the MC using coordinated multipoint remote sensing and in situ observations from Solar Orbiter, STEREO-A, Solar and Heliospheric Observatory, and Wind. …”
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Multispacecraft Energetic Particle Enhancements Associated with a Single Corotating Interaction Region by M. J. Starkey, M. A. Dayeh, M. I. Desai, R. Bučík, S. T. Hart, H. A. Elliott

“…The CIR is identified at additional spacecraft (Solar Terrestrial Relations Observatory, STEREO-A; Solar Orbiter, SolO; and Advanced Composition Explorer, ACE) using a corotation time delay estimation, and energetic proton spectra from each spacecraft are compared. …”
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The S-Web Origin of Composition Enhancement in the Slow-to-moderate Speed Solar Wind by B. J. Lynch, N. M. Viall, A. K. Higginson, L. Zhao, S. T. Lepri, X. Sun

“…We discuss our results in the context of previous observations of the ∼90 minutes periodic density structures in the slow solar wind, further development of the dynamic S-Web model, and future Parker Solar Probe and Solar Orbiter joint observational campaigns.…”
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Jovian Electrons in the Inner Heliosphere: Opportunities for Multi-spacecraft Observations and Modeling by R. D. Strauss, N. Dresing, N. E. Engelbrecht, J. G. Mitchell, P. Kühl, S. Jensen, S. Fleth, B. Sánchez-Cano, A. Posner, J. S Rankin, C. O. Lee, J. P. van den Berg, S. E. S. Ferreira, B. Heber

“…Model results are also shown along the expected trajectories of selected spacecraft, including the off-ecliptic phase of the Solar Orbiter mission from 2025 onward. Lastly, we revisit the use of historical data and discuss upcoming missions that may contribute to Jovian electron measurements.…”
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Switchback Patches Evolve into Microstreams via Magnetic Relaxation by Shirsh Lata Soni, Mojtaba Akhavan-Tafti, Gabriel Ho Hin Suen, Justin Kasper, Marco Velli, Rossana De Marco, Liang Zhao, Christopher J Owen

“…To further investigate this, two distinct solar wind parcels tracing back to a similar solar source region were examined during a radial alignment between Parker Solar Probe (@25.8RS) and Solar Orbiter (@152RS). The one caveat was that the two probes were located on opposite sides of the heliospheric current sheet during the alignment. …”
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Exploiting Laboratory and Heliophysics Plasma Synergies by Jill Dahlburg, William Amatucci, Michael Brown, Vincent Chan, James Chen, Christopher Cothran, Damien Chua, Russell Dahlburg, George Doschek, Jan Egedal, Cary Forest, Russell Howard, Joseph Huba, Yuan-Kuen Ko, Jonathan Krall, J. Martin Laming, Robert Lin, Mark Linton, Vyacheslav Lukin, Ronald Murphy, Cara Rakowski, Dennis Socker, Allan Tylka, Angelos Vourlidas, Harry Warren, Brian Wood

“…The Solar Dynamics Observatory (SDO) and the upcoming Solar Orbiter with the Heliospheric Imager (SoloHI) on-board will also be discussed. …”
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The Closest View of a Fast Coronal Mass Ejection: How Faulty Assumptions Near Perihelion Lead to Unrealistic Interpretations of PSP/WISPR Observations by Ritesh Patel, Matthew J. West, Daniel B. Seaton, Phillip Hess, Tatiana Niembro, Katharine K. Reeves

“…We also used single viewpoint STEREO/COR-2A images to fit the Graduated Cylindrical Shell (GCS) model to the CME while incorporating the source region location from Extreme-Ultraviolet Imager of Solar Orbiter and estimated a 3D speed of ≈2700 km s ^−1 . …”
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Double Power-law Formation by Sequential Particle Acceleration by S. E. Guidoni, C. R. DeVore, J. T. Karpen, M. Alaoui

“…Our analytical model provides tools to interpret space- and ground-based observations from RHESSI, FOXSI, NuSTAR, Solar Orbiter/STIX, EOVSA, and future high-energy missions.…”
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Acceleration and Release of Solar Energetic Particles Associated with a Coronal Shock on 2021 September 28 Observed by Four Spacecraft by Bin Zhuang, Noé Lugaz, David Lario, Ryun-Young Kwon, Nicolina Chrysaphi, Jonathan Niehof, Tingyu Gou, Lulu Zhao

“…Taking advantage of close-to-the-Sun measurements by Parker Solar Probe (PSP) and Solar Orbiter (SolO), we investigate an SEP event that occurred on 2021 September 28 and was observed at different locations by SolO, PSP, STEREO-A, and near-Earth spacecraft. …”
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3He and Fe Spectral Properties in 3He-rich Solar Energetic Particle Events by G. M. Mason, A. Kouloumvakos, G. C. Ho, R. C. Allen, R. Gómez-Herrero, R. F. Wimmer-Schweingruber, J. Rodríguez-Pacheco

“…We have surveyed ^3 He-rich events on the Solar Orbiter mission from 2020 April to 2024 April, selecting isolated injections whose rollover ^3 He spectral shape is presumed to represent the initial acceleration state, unprocessed by subsequent activity such as coronal mass ejections or jets. …”
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The Role of High-frequency Transverse Oscillations in Coronal Heating by Daye Lim, Tom Van Doorsselaere, David Berghmans, Richard J. Morton, Vaibhav Pant, Sudip Mandal

“…Recently, the discovery of high-frequency transverse oscillations in small-scale loops has been accelerated by the Extreme Ultraviolet Imager on board Solar Orbiter. We perform a meta-analysis by considering the oscillation parameters reported in the literature. …”
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Temporally Resolved Type III Solar Radio Bursts in the Frequency Range 3–13 MHz by Antonio Vecchio, Milan Maksimovic, Nicolina Chrysaphi, Eduard P. Kontar, Vratislav Krupar

“…A dedicated configuration of the Radio and Plasma Waves (RPW) High Frequency Receiver (HFR) on the Solar Orbiter mission, allowing for a temporal resolution as high as ∼0.07 s (up to 2 orders of magnitude better than any other spacecraft measurements), provides for the very first time resolved measurements of the typical decay time values in this frequency range. …”
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GROUND BASED SUPPORT OF THE SPACE MISSION PARKER PERFORMED WITH UKRAINIAN LOW FREQUENCY RADIO TELESCOPES by V. V. Dorovsky, V. M. Melnik, A. I. Brazhenko

“…These have been the reasons for recent launches of the space missions intended for stud- ying the Sun and its corona, such as the Parker Solar Probe (PSP) and the Solar Orbiter. The present work is aimed at demonstrating effectiveness of the ground-based support for the space missions, the PSP before all, which is provided by the large Ukrainian radio telescopes of the decameter wavelength range. …”
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Multi-spacecraft Observations of the 2022 March 25 CME and EUV Wave: An Analysis of Their Propagation and Interrelation by Alessandro Liberatore, Paulett C. Liewer, Angelos Vourlidas, Carlos R. Braga, Marco Velli, Olga Panasenco, Daniele Telloni, Salvatore Mancuso

“…The CME was observed by Solar Orbiter (SolO) during its first close perihelion (0.32 au) and by several other spacecraft from different viewpoints. …”
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Nonthermal Observations of a Flare Loop-top Using IRIS Fe xxi: Implications for Turbulence and Electron Acceleration by William Ashfield IV, Vanessa Polito, Sijie Yu, Hannah Collier, Laura A. Hayes

“…Evidence of electron acceleration at this time is further supported by hard X-ray measurements from the Spectrometer/Telescope for Imaging X-rays on board Solar Orbiter. Using the decay of nonthermal broadenings as a proxy for turbulent dissipation, we found the rate of energy dissipation to be consistent with the power of nonthermal electrons deposited into the chromosphere, suggesting a possible connection between turbulence and electron acceleration.…”
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