A5053742731- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Geophysics and Gravity Measurements
- Solar Radiation and Photovoltaics
- Spacecraft Design and Technology
- CCD and CMOS Imaging Sensors
- Earthquake Detection and Analysis
- Calibration and Measurement Techniques
- Gamma-ray bursts and supernovae
- Photovoltaic System Optimization Techniques
- Planetary Science and Exploration
- Spacecraft Dynamics and Control
- Space exploration and regulation
- Spacecraft and Cryogenic Technologies
- Inertial Sensor and Navigation
- Atmospheric Ozone and Climate
- Advanced Research in Science and Engineering
- Astrophysics and Cosmic Phenomena
- Adenosine and Purinergic Signaling
- Magnetic confinement fusion research
- Reservoir Engineering and Simulation Methods
- Nuclear Receptors and Signaling
Royal Observatory of Belgium
2014-2024
Lomonosov Moscow State University
2012-2024
Heptares Therapeutics (United Kingdom)
2024
National Astronomical Observatory of Japan
2019
Institute of Space and Astronautical Science
2019
Moscow State University
2005-2018
University of Liège
2014-2018
European Space Research and Technology Centre
2016-2018
Moscow Engineering Physics Institute
2017-2018
Laboratoire d’Astrophysique de Marseille
2017
We present the results of an investigation sequence events from Sun to Earth that ultimately led 88 major geomagnetic storms (defined by minimum Dst ≤ −100 nT) occurred during 1996–2005. The are achieved through cooperative efforts originated at Living with a Star (LWS) Coordinated Data‐Analysis Workshop (CDAW) held George Mason University in March 2005. On basis careful examination complete array solar and situ wind observations, we have identified characterized, for each storm, overall...
The goal of this paper is to study the smallest brightening events observed in EUV quiet Sun. We use commissioning data taken by EUI instrument onboard recently launched Solar Orbiter mission. On 2020 May 30, was situated at 0.556AU from Its HRIEUV telescope 17.4nm passband reached an exceptionally high two-pixel spatial resolution 400km. size and duration small-scale structures determined data, while their height estimated triangulation with simultaneous SDO/AIA data. This first stereoscopy...
Abstract On 2022 February 15, an impressive filament eruption was observed off the solar eastern limb from three remote-sensing viewpoints, namely, Earth, STEREO-A, and Solar Orbiter. In addition to representing most-distant at extreme ultraviolet wavelengths—captured by Orbiter's field of view extending above 6 R ⊙ —this event also associated with release a fast (∼2200 km s −1 ) coronal mass ejection (CME) that directed toward BepiColombo Parker Probe. These two probes were separated 2° in...
EIT waves and extreme-ultraviolet (EUV) dimmings attract particular attention as they frequently accompany Coronal Mass Ejections (CMEs). We present several examples of EUV with morphologies previously unreported in the literature. report for first time an wave Fe XV (284 Å) bandpass SOHO/EIT instrument. The observations this event confirm previous results that is a purely coronal phenomenon does not propagate transition region plasma. Two events initiated close to solar limb are...
Seventy‐nine major geomagnetic storms (minimum Dst ≤ −100 nT) observed in 1996 to 2004 were the focus of a “Living with Star” Coordinated Data Analysis Workshop (CDAW) March 2005. In nine cases, storm driver appears have been purely corotating interaction region (CIR) without any contribution from coronal mass ejection‐related material (interplanetary ejections (ICMEs)). These generated by structures within CIRs located both before and/or after stream interface that included persistently...
Abstract. Coronal Mass ejections (CMEs) are enormous eruptions of magnetized plasma expelled from the Sun into interplanetary space, over course hours to days. They can create major disturbances in medium and trigger severe magnetic storms when they collide with Earth's magnetosphere. It is important know their real speed, propagation direction 3-D configuration order accurately predict arrival time at Earth. Using data SECCHI coronagraphs onboard STEREO mission, which was launched October...
Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by Parker Solar Probe. The switchbacks' formation mechanism and sources still unresolved, although candidate mechanisms include Alfv\'enic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, geometrical effects related to spiral. This Letter presents observations from Metis coronagraph onboard Orbiter a single propagating S-shaped vortex,...
Coronal holes are areas on the Sun with open magnetic field lines. They a source region of solar wind, but how wind emerges from coronal is not known. We observed hole using Extreme Ultraviolet Imager Solar Orbiter spacecraft. identified jets scales few hundred kilometers, which last 20 to 100 seconds and reach speeds ~100 kilometers per second. The powered by reconnection have kinetic energy in picoflare range. intermittent widespread within hole. suggest that such could produce enough...
Abstract Magnetic reconnection is a key mechanism involved in solar eruptions and also prime possibility to heat the low corona millions of degrees. Here, we present ultra-high-resolution extreme ultraviolet observations persistent null-point at scale about 390 km over one hour Extreme-Ultraviolet Imager on board Solar Orbiter spacecraft. The show formation configuration above minor positive polarity embedded within region dominant negative near sunspot. gentle phase evidenced by sustained...
Aiming to assess the progress and current challenges on formidable problem of prediction solar energetic events since COSPAR/ International Living With a Star (ILWS) Roadmap paper Schrijver et al. (2015), we attempt an overview status global research efforts. By refer flares, coronal mass ejections (CMEs), particle (SEP) events. The emphasis, therefore, is methods flares eruptions, as well their associated SEP manifestations. This work complements COSPAR Space Weather Action Teams (ISWAT)...
Solar campfires are fine-scale heating events, recently observed by Extreme Ultraviolet Imager (EUI), onboard Orbiter. Here we use EUI 174\AA\ images, together with EUV images from SDO/AIA, and line-of-sight magnetograms SDO/HMI to investigate the magnetic origin of 52 randomly selected in quiet solar corona. We find that (i) rooted at edges photospheric network lanes; (ii) most reside above neutral line between majority-polarity flux patch a merging minority-polarity patch, cancelation rate...
Context. The Extreme Ultraviolet Imager (EUI), onboard Solar Orbiter consists of three telescopes: the two High Resolution Imagers in EUV (HRIEUV) and Lyman-{\alpha} (HRILya), Full Sun (FSI). Orbiter/EUI started its Nominal Mission Phase on 2021 November 27. Aims. EUI images from largest scales extended corona off limb, down to smallest features at base chromosphere. is therefore a key instrument for connection science that heart mission goals. Methods. highest resolution achieved when...
Decayless kink oscillations are omnipresent in the solar atmosphere, and they a viable candidate for coronal heating. Although there have been extensive studies of decayless loops with lengths few hundred megameters, properties these small-scale (∼10 mm) yet to be explored. In this study, we present small embedded quiet corona holes. We use high-resolution observations from Extreme Ultraviolet Imager on board Solar Orbiter pixel scales 210 km cadence 5 s or better. analysed 42 loop varying...
On 15 May 2005, a huge interplanetary coronal mass ejection (ICME) was observed near Earth. It triggered one of the most intense geomagnetic storms solar cycle 23 (Dst peak = -263 nT). This structure has been associated with two-ribbon flare, filament eruption, and originating in active region 10759 (NOAA number). We analyze here sequence events, from wind measurements (at 1 AU) back to Sun, understand origin evolution this geoeffective ICME. From detailed observational study situ magnetic...
We report observations of quasi-periodic pulsations (QPPs) during the X2.2 flare 2011 February 15, observed simultaneously in several wavebands. focus on fluctuations timescale 1–30 s and find different time lags between During impulsive phase, Reuven Ramaty High Energy Solar Spectroscopic Imager channels range 25–100 keV lead all other channels. They are followed by Nobeyama RadioPolarimeters at 9 17 GHz extreme-ultraviolet (EUV) Euv SpectroPhotometer (ESP) board Dynamic Observatory. The...
We present a multiwavelength study of the 2012 March 5 solar eruptive event, with an emphasis on radio triangulation associated bursts. The main points are reconstruction propagation shock waves driven by coronal mass ejections (CMEs) using observations and finding relative positions CME, CME-driven wave, its signatures. For first time, is applied to different types bursts in same event performed detailed way goniopolarimetric from STEREO/Waves WIND/Waves spacecraft. was X1.1 flare NOAA AR...
Abstract We present results of a two-dimensional fully kinetic particle-in-cell simulation in order to shed light on the role whistler waves scattering strahl electrons and heat-flux regulation solar wind. model electron velocity distribution function as initially composed core populations typically encountered near-Sun wind observed by Parker Solar Probe. demonstrate that, consequence evolution (VDF), two branches instability can be excited, which drive propagating direction oblique or...
We study here the phenomena of decayless kink oscillations in a system active region (AR) coronal loops. Using high resolution observations from two different instruments, namely Extreme Ultraviolet Imager (EUI) on board Solar Orbiter and Atmospheric Imaging Assembly (AIA) Dynamics Observatory, we follow these AR loops for an hour each three consecutive days. Our results show significantly more resolved waves higher-resolution EUI data compared with AIA data. Furthermore, same exhibits many...
Relaxation of braided coronal magnetic fields through reconnection is thought to be a source energy heat plasma in active region loops. However, observations heating associated with an untangling braids remain sparse. One reason for this paucity could the lack sufficiently high spatial and temporal resolution capture process action. Using new (250-270 km on Sun) cadence (3-10 s) from Extreme Ultraviolet Imager (EUI) board Solar Orbiter, we observed small-scale different regions. The...
Abstract From 2022 March 18 to 21, NOAA Active Region (AR) 12967 was tracked simultaneously by Solar Orbiter at 0.35 au and Hinode/EIS Earth. During this period, strong blueshifted plasma upflows were observed along a thin, dark corridor of open magnetic field originating the AR’s leading polarity continuing toward southern extension northern polar coronal hole. A potential source surface model shows large lateral expansion corridor. Squashing factor Q -maps large-scale topology further...
Solar wind, classified by its bulk speed and the Alfvénic nature of fluctuations, generates heliosphere. The elusive physical processes responsible for generation different types this wind are a topic active debate. Recent observations reveal intermittent jets, with kinetic energy in picoflare range, emerging from dark areas polar coronal hole threaded open magnetic field lines. These could substantially contribute to solar wind. However, their ubiquity direct links have not been...