A5013155472- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Stellar, planetary, and galactic studies
- Solar Radiation and Photovoltaics
- Gamma-ray bursts and supernovae
- Atmospheric Ozone and Climate
- Monetary Policy and Economic Impact
- Magnetic Field Sensors Techniques
- Market Dynamics and Volatility
- Legume Nitrogen Fixing Symbiosis
- Spacecraft Dynamics and Control
- Dark Matter and Cosmic Phenomena
- Soybean genetics and cultivation
- Neutrino Physics Research
- Geological and Geophysical Studies
- Energy Load and Power Forecasting
- Magnetic Bearings and Levitation Dynamics
- Radiation Therapy and Dosimetry
- Photovoltaic System Optimization Techniques
- Astrophysics and Cosmic Phenomena
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- Plant Genetic and Mutation Studies
University of New Hampshire
2020-2025
University of California, San Diego
2023
University of Science and Technology of China
2016-2020
China Astronaut Research and Training Center
2016-2018
PLA Navy General Hospital
2015
Abstract Simultaneous in situ measurements of coronal mass ejections (CMEs), including both plasma and magnetic field, by two spacecraft radial alignment have been extremely rare. Here, we report on one such CME measured Solar Orbiter (SolO) Wind 2021 November 3–5, while the were radially separated a heliocentric distance 0.13 au angularly only 2.2°. We focus cloud (MC) part CME. find notable changes R N field components speed profiles inside MC between SolO Wind. observe greater at farther...
Abstract Coronal mass ejections (CMEs) are large-scale eruptions with a typical radial size at 1 au of 0.21 but their angular width in interplanetary space is still mostly unknown, especially for the magnetic ejecta (ME) part CME. We take advantage STEREO-A separation 20°–60° from Sun–Earth line 2020 October to 2022 August, and perform two-part study constrain MEs ecliptic plane: (a) we all CMEs that observed remotely propagate between Sun–STEREO-A lines determine how many impact one or both...
Abstract On 28 October 2021, solar eruptions caused intense and long‐lasting energetic particle (SEP) flux enhancements observed by spacecraft located over a wide longitudinal range in the heliosphere. SEPs arriving at Earth 73rd ground level enhancement (GLE) event recorded ground‐based neutron monitors. In particular, this is also first GLE seen on surface of three planetary bodies, Earth, Moon, Mars, radiation detectors as shown study. We derive event‐integrated proton spectrum from...
The ISWAT (International Space Weather Action Teams) heliosphere clusters H1 and H2 have a focus on interplanetary space its characteristics, especially the large-scale co-rotating transient structures impacting Earth. Solar wind stream interaction regions, generated by between high-speed solar originating in open coronal magnetic fields slower from closed fields, are regions of compressed plasma field followed streams that recur at ∼27 day rotation period. Short-term reconfigurations lower...
Abstract Magnetic flux ropes (MFRs) are one kind of fundamental structures in the solar/space physics and involved various eruption phenomena. Twist, characterizing how magnetic field lines wind around a main axis, is an intrinsic property MFRs, closely related to free energy stableness. Although effect twist on behavior MFRs had been widely studied observations, theory, modeling, numerical simulations, it still unclear much amount carried by solar atmosphere heliosphere what role played...
To investigate the factors that control success and/or failure of solar eruptions, we study magnetic field and 3-Dimensional (3D) configuration 16 filament eruptions during 2010 July - 2013 February. All these events, i.e., erupted but failed to be ejected become a coronal mass ejection (CME), are with maximum height exceeding $100 Mm$. The source regions is approximated by potential extrapolation method. 3D reconstructed from three vantage points observations STEREO Ahead/Behind SDO...
Abstract We present an analysis of in situ and remote-sensing measurements a coronal mass ejection (CME) that erupted on 2021 February 20 impacted both the Solar TErrestrial RElations Observatory (STEREO)-A Wind spacecraft, which were separated longitudinally by 55°. Measurements 24 at spacecraft are consistent with passage magnetic ejecta (ME), making this one widest reported multispacecraft ME detections. The CME is associated low-inclined wide filament eruption from Sun’s southern...
Abstract The largest geomagnetic storm so far, called 2015 St. Patrick's Day event, in the solar cycle 24 was produced by a fast coronal mass ejection (CME) originating on 15 March 2015. It an initially west‐oriented CME and expected to only cause weak disturbance. Why did this finally such large storm? We try find some clues investigating its propagation from Sun 1 AU. First, we reconstruct CME's kinematic properties corona SOHO Solar Dynamics Observatory imaging data with aid of graduated...
Abstract In situ measurements from spacecraft typically provide a time series at single location through coronal mass ejections (CMEs), and they have been one of the main methods to investigate CMEs. The CME properties derived these in are affected by temporal changes that occur as passes over spacecraft, such radial expansion aging, well spatial variations within CME. This study uses multispacecraft same close separations both variability (how different profile is when probed two each...
Abstract We investigate whether Alfvénic fluctuations (AFs) can affect the structure of magnetic ejecta (ME) within interplanetary coronal mass ejections (ICMEs). study an ICME observed on 2001 December 29 at 1 au by Advanced Composition Explorer (ACE) and Wind, a total angular separation ~0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover> <mml:mrow> <mml:mo>.</mml:mo> </mml:mrow> <mml:mtext>°</mml:mtext> </mml:mover> </mml:math> 8 (~ 0.014 au). focus...
Abstract Over the past decades, missions at L1 point have been providing solar wind and interplanetary magnetic field measurements that are necessary for forecasting space weather Earth with high accuracy a lead time of few tens minutes. Improving time, while maintaining relatively level accuracy, can be achieved sunward L1, so‐called sub‐L1 monitors. However, too much is unknown to plan monitors as operational missions: both orbital requirements such missions, achievable forecasts based on...
Abstract The angular width of coronal mass ejections (CMEs) and the variations CME properties for various crossings through structure remain insufficiently studied inadequately understood, primarily due to rarity multispacecraft measurements. From 2022 January 2023 August, STEREO-A was in relative proximity Sun–Earth first Lagrangian (L1) point, with STEREO-A–L1 separation reducing from 35 ∘ 0 , corresponding a time an increasing activity solar cycle 25 approaching its maximum. This provides...
Abstract In situ measurements of coronal mass ejections (CMEs) when they pass over an interplanetary probe are one the main ways we directly measure their properties. However, such in profiles subject to several observational constraints that still poorly understood. This work aims at quantifying them, namely, aging effect, using a CME simulated with three-dimensional magnetohydrodynamical code. The synthetic profile and instantaneous magnetic field strength differ more from each other taken...
Abstract As one of the most violent astrophysical phenomena, coronal mass ejections (CMEs) have strong potential space weather effects. However, not all Earth-directed CMEs encounter Earth and produce geo-effects. One reason is deflected propagation in interplanetary space. Although there been several case studies clearly showing such deflections, it has yet statistically assessed how significantly would influence CME’s arrival at Earth. We develop an integrated CME-arrival forecasting...
Abstract Deflection of coronal mass ejections (CMEs) in the interplanetary space, especially ecliptic plane, serves as an important factor deciding whether CMEs arrive at Earth. Observational studies have shown evidence for deflection, whose detailed dynamic processes, however, remain obscure. Here we developed a 2.5D ideal magnetohydrodynamic simulation to study propagation traveling with different speeds heliospheric equatorial plane. The confirms existence CME deflection which is related...
A fundamental property of coronal mass ejections (CMEs) is their radial expansion, which determines the increase in CME size and decrease magnetic field strength as propagates. expansion can be investigated either by using remote observations or in-situ measurements based on multiple spacecraft conjunction. However, there have been only few case studies combining both observations. It therefore unknown if estimated remotely corona consistent with that locally heliosphere. To address this...
Abstract The main driver of the acceleration solar energetic particles (SEPs) is believed to be shocks driven by coronal mass ejections. Extreme-ultraviolet (EUV) waves are thought propagating footprint shock on surface. One key questions in SEP research timing release with respect time when EUV wave magnetically connects an observer. Taking advantage close-to-the-Sun measurements Parker Solar Probe (PSP) and Orbiter (SolO), we investigate event that occurred 2021 September 28 was observed...
Large-scale solar eruptions are believed to have a magnetic flux rope as the core structure. However, it remains elusive how builds up and what triggers its eruption. Recent observations found that prominence erupted following multiple episodes of "flux feeding". During each episode, chromospheric fibril rose merged with lying above. In this letter, we carried out 2.5-dimensional magnetohydrodynamic (MHD) numerical simulations investigate whether flux-feeding mechanism can explain such an...
The 2011 January 28 M1.4 flare exhibits two side-by-side candle-flame-shaped loop systems underneath a larger cusp-shaped structure during the decay phase, as observed at northwestern solar limb by Solar Dynamics Observatory (SDO). northern system brightens following initiation of within southern system, but all three structures are characterized ~ 10 MK temperatures, hotter than arch-shaped loops underneath. "Ahead" satellite Terrestrial Relations (STEREO) provides top view, in which...
Abstract On 2020 April 19–20, a solar ejection was seen by spacecraft in radial alignment that included Solar Orbiter and Wind. The contained magnetic flux rope where field plasma parameters were well correlated between spacecraft. This structure is called an “unperturbed rope” (UMFR). Ahead of the UMFR portion (not sheath) referred to as “upstream” (US). We focus on US inquire why correlation so much weaker there. Specifically, we analyze data collected at 0.81 au Wind L1. show plausible...
The important role played by magnetic reconnection in the early acceleration of coronal mass ejections (CMEs) has been widely discussed. However, as CMEs may have expansion speeds comparable to their propagation corona, it is not clear whether and how contributes true separately. To address this question, we analyze dynamics a moderately fast CME on 2013 February 27, associated with continuous its front into high even though speed had reached $\sim$700~km~s$^{-1}$ larger than solar wind...
We present in this paper an operational solar wind prediction system. The system is outcome of the collaborative efforts between scientists research communities and forecasters at Space Environment Prediction Center (SEPC) China. This mainly composed three modules: (1) a photospheric magnetic field extrapolation module, along with Wang-Sheeley-Arge (WSA) empirical method, to obtain background speed strength on source surface; (2) modified Hakamada-Akasofu-Fry (HAF) kinematic module for...