A5100418275- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Gamma-ray bursts and supernovae
- Laser-induced spectroscopy and plasma
- Stellar, planetary, and galactic studies
- Atmospheric Ozone and Climate
- Earthquake Detection and Analysis
- Statistical Methods and Bayesian Inference
- Radio Astronomy Observations and Technology
- Magnetic Properties and Applications
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Advanced Statistical Methods and Models
- Nuclear physics research studies
- High-pressure geophysics and materials
- Galaxies: Formation, Evolution, Phenomena
Chinese Academy of Sciences
2020-2023
National Astronomical Observatories
2020-2023
University of Chinese Academy of Sciences
2022-2023
Institute of Modern Physics
2023
Brigham Young University
2001
Abstract X-ray bursts are among the brightest stellar objects frequently observed in sky by space-based telescopes. A type-I burst is understood as a violent thermonuclear explosion on surface of neutron star, accreting matter from companion star binary system. The powered nuclear reaction sequence known rapid proton capture process (rp process), which involves hundreds exotic neutron-deficient nuclides. At so-called waiting-point nuclides, stalls until slower β + decay enables bypass. One...
Using a novel method of isochronous mass spectrometry, the masses $^{62}\mathrm{Ge}$, $^{64}\mathrm{As}$, $^{66}\mathrm{Se}$, and $^{70}\mathrm{Kr}$ are measured for first time, $^{58}\mathrm{Zn}$, $^{61}\mathrm{Ga}$, $^{63}\mathrm{Ge}$, $^{65}\mathrm{As}$, $^{67}\mathrm{Se}$, $^{71}\mathrm{Kr}$, $^{75}\mathrm{Sr}$ redetermined with improved accuracy. The new allow us to derive residual proton-neutron interactions ($\ensuremath{\delta}{V}_{pn}$) in $N=Z$ nuclei, which found decrease...
Abstract We find a universal power-law scaling of magnetic helicity distribution in the solar corona. Magnetic is dynamical invariant for ideal magnetohydrodynamics (MHD) and characterizes complex field structure by measuring degree knottiness its lines. treat turbulent as superposition random waves develop statistical topology method regarding randomly tangled Based on behavior lines, we consider their topology-specified theoretically derive power laws flux helicity. law −7/4 to when line...
  Magnetic helicity is an important concept in solar physics, with a number of theoretical statements pointing out the role magnetic flares and coronal mass ejections (CMEs). Here we construct sample 47 flares, which contains 18 no-CME-associated confined 29 CME-associated eruptive flares. We calculate change ratios free energy before after these Our calculations show that distinct different distributions The median value -0.8%, while this -14.5% for For energy, -4.3% whereas -14.6%...
Aims. Solar active regions (ARs), which are formed by flux emergence, serve as the primary sources of solar eruptions. However, specific physical mechanism that governs emergence process and its relationship with flare productivity remains to be thoroughly understood. Methods. We examined 136 emerging ARs, focusing on evolution their magnetic helicity energy during phase. Based relation between accumulation evolution, we categorized samples investigated productivity. Results. The ARs studied...
Magnetic helicity is an important concept in solar physics, with a number of theoretical statements pointing out the role magnetic flares and coronal mass ejections (CMEs). Here we construct sample 47 flares, which contains 18 no-CME-associated confined 29 CME-associated eruptive flares. We calculate change ratios free energy before after these Our calculations show that distinct different distributions The median value $-0.8$%, while this $-14.5$% for For energy, $-4.3$% whereas $-14.6$%...
Duo to the large magnetic Reynolds number, helicity originating from solar interior can be carried away through photosphere into corona. However, relationship between accumulated flux and in corona is still unclear. By selecting 36 newly emerging active regions 23rd cycle, we apply optical flow methods derive ($H_m^p$) by using sequential longitudinal magnetograms, use nonlinear force-free field extrapolation obtain 3D coronal field, adopt finite volume calculate instantaneous relative...
The black hole core of a galaxy attracts large amounts gases around it, forming an active galactic nucleus (AGN). An AGN emits huge quantities energy, leading to jets. In 16, Ma and Wang established model governing the AGN, in which they obtain driving force this paper, we generalize their couple magnetic fields describing plasma, derive explosive electromagnetic energy as proposed (1.13) 16.
Magnetic helicity is an important concept in solar physics, with a number of theoretical statements pointing out the role magnetic flares and coronal mass ejections (CMEs). Here we construct sample 47 flares, which contains 18 no-CME-associated confined 29 CME-associated eruptive flares. We calculate change ratios free energy before after these Our calculations show that distinct different distributions The median value −0.8%, while this −14.5% for For energy,...
Aims. Solar active regions (ARs), which are formed by flux emergence, serve as the primary sources of solar eruptions. However, specific physical mechanism that governs emergence process and its relationship with flare productivity remains to be thoroughly understood. Methods. We examined 136 emerging ARs, focusing on evolution their magnetic helicity energy during phase. Based relation between accumulation evolution, we categorized samples investigated productivity. Results. The ARs studied...
Abstract We present the observational evidence of existence a double-decker filament channel (FC) by using observations in extreme ultraviolet and H α wavelengths. For both FCs, east foot-point roots active region (AR), while west one remote quiet region. The bottom FC (FC1) appears as intermittent filaments. Within AR, FC1 an S-shaped (F1), which consisted two J-shaped filaments (F1S/F1N for south/north one). upper (FC2), only part is filled with dark plasma visible small (F2). Its around...
Oxygen ions upflowing from the earth magnetosphere have been consider as a very important population in dynamics, and idea is widely accepted that enhancement solar wind dynamic pressure will influence processes. In this study, based on observational data obtained near crossing of magnetopause by Cluster 3 satellite during 2003 to 2008, we compared flux velocity distribution magnetosheath oxygen with energy above 3keV at different conditions. It found (a) There positive correlation between...
<p>    Magnetic helicity is conserved in ideal magnetic fluid and still approximately the process of fast reconnection when Reynolds number large enough. We can derive injecting into corona from flux through photoshpere. A statistical research carried out to investigate dissipation during major flares. choose 69M-up flares 16 flare-productive active regions 24th cycle corona. Among these flares, 19 X-up utilize Differential Affine Velocity Estimator...
Absolute x-ray calibration of laser-produced plasmas was performed using a CCD linear array and focusing crystal spectrometer. The were created by Nd glass laser high repetition rate Nd-YAG laser. A commercial used for detection. has 3724 pixels giving total length approximately 30 mm. First the detector absolutely calibrated laser- produced an FE<SUP>55</SUP> isotope source. sensitivity about two orders magnitude higher than photographic film. monitoring absolute yield, finding optical...