145 citations · 753 across the 26 of their papers we have counts for
29 papers
Formation Dynamics of a Rotating Solar Spicule-like Event and Associated Energy-Mass Transport
Liufan Gong, Lei Ni, Guanchong Cheng +3
We performed three-dimensional radiative magnetohydrodynamic(3D RMHD) simulations in an upward-directed (positive-polarity) open magnetic field with an initial background strength…
Plasmoid-Trapped Condensation Associated with a Transient Thermal-Instability-Like Process in Chromospheric Magnetic Reconnection
Abdullah Zafar, Lei Ni, Samrat Sen +4
We perform high-resolution 2.5D single-fluid magnetohydrodynamic (MHD) simulations to explore the development of cool-dense structures within plasmoids during chromospheric magneti…
Research Progress on Solar Small-Scale Dynamo
Wen-Jie Jiang, Lei Ni, Chun-Lan Jin +2
The small-scale solar dynamo theory, as the core mechanism explaining the origin of the persistent, disperse weak magnetic field in the quiet Sun regions, has made significant prog…
Radiative MHD Studies of Solar Spicules: Driving Mechanisms and the Role of Background Magnetic Field
Jin Li, Lei Ni, Robertus Erdélyi +3
We conduct 2.5D radiative magnetohydrodynamic (MHD) simulations to investigate the driving mechanisms of the solar spicules in coronal holes and how the different background magnet…
Energy and mass transport associated with impulsive spicular flows in solar coronal holes
Lei Ni, Jun Lin, Tanmoy Samanta +3
How the solar atmosphere is heated from a temperature of about \,K in the lower atmosphere to about \,MK in the corona has challenged the astrophysical community…
Three dimensional magnetic reconnection mediated with plasmoids and the resulted multi-thermal emissions in the cool atmosphere of the Sun
Guanchong Cheng, Lei Ni, Robert Cameron +3
Flux emergence is ubiquitous in the Sun's lower atmosphere, where the emerging magnetic flux can reconnect with the pre-existing magnetic field. We investigate plasmoid formation a…
The effect of plasma- on the heating mechanisms during magnetic reconnection in partially ionized low solar atmosphere
Abdullah Zafar, Lei Ni, Kaifeng Kang +5
We performed numerical simulations of magnetic reconnection with different strength of magnetic fields from the solar photosphere to the upper chromosphere. The main emphasis is to…
Numerical simulation of oscillatory magnetic reconnection modulated by solar convective motions
Yifu Wang, Lei Ni, Guanchong Cheng +3
Oscillatory magnetic reconnection is a periodic magnetic reconnection process, during which the current sheet's orientation and the magnetic connections change periodically. This p…
Unraveling the Trigger Mechanism of Explosive Reconnection in Partially Ionized Solar Plasma
Abdullah Zafar, Lei Ni, Jun Lin +1
Plasmoid instability is usually accounted for the onset of fast reconnection events observed in astrophysical plasmas. However, the measured reconnection rate from observations can…
Evidence for Plasmoid-mediated Magnetic Reconnection during a Small-scale Flare in the Partially Ionized Low Solar Atmosphere
Guanchong Cheng, Lei Ni, Zehao Tang +4
Magnetic reconnection plays a crucial role in the energy release process for different kinds of solar eruptions and activities. The rapid solar eruption requires a fast reconnectio…
A magnetic reconnection model for the hot explosion with both ultraviolet and Hα wing emissions
Guanchong Cheng, Lei Ni, Yajie Chen +1
Ellerman bombs (EBs) with significant H wing emissions and ultraviolet bursts (UV bursts) with strong Si IV emissions are two kinds of small transient brightening events that oc…
High magnetic reconnection at different altitudes in the cool low solar atmosphere
Abdullah Zafar, Lei Ni, Jun Lin +1
We numerically studied magnetic reconnection in a high hydrogen-helium plasma at different altitudes from the photosphere to the upper chromosphere. The time dependent ionizati…
Plausibility of ultraviolet burst generation in the low solar chromosphere
Lei Ni, Guanchong Cheng, Jun Lin
Ultraviolet (UV) bursts and Ellerman bombs (EBs) are small-scale magnetic reconnection events taking place in the highly stratified, low solar atmosphere. It is still not clear whe…
The Ellerman bomb and Ultraviolet burst triggered successively by an emerging magnetic flux rope
Guanchong Cheng, Lei Ni, Yajie Chen +2
Ellerman bombs (EBs) and Ultraviolet (UV) bursts are common brightening phenomena which are usually generated in the low solar atmosphere of emerging flux regions. In this paper, w…
A Magnetic Reconnection model for Hot Explosions in the Cool Atmosphere of the Sun
Lei Ni, Yajie Chen, Hardi Peter +2
UV bursts and Ellerman bombs are transient brightenings observed in the low solar atmospheres of emerging flux regions. Observations have discovered the cospatial and cotemporal EB…
Magnetic reconnection in partially ionized plasmas
Lei Ni, Hantao Ji, Nicholas A. Murphy +1
Magnetic reconnection has been intensively studied in fully ionized plasmas. However, plasmas are often partially ionized in astrophysical environments. The interactions between th…
Subarcsecond blobs in flare-related coronal jets
Q. M. Zhang, L. Ni
In this paper, we report our multiwavelength observations of subarcsecond blobs in coronal jets. In AR 12149, a C5.5 circular-ribbon flare occurred on 2014 August 24. Two jets (jet…
Onset of secondary instabilities and plasma heating during magnetic reconnection in strongly magnetized regions of the low solar atmosphere
Lei Ni, Vyacheslav S. Lukin
We numerically study magnetic reconnection on different spatial scales and at different heights in the weakly ionized plasma of the low solar atmosphere (around ~km above…
Magnetic reconnection in the low solar chromosphere with a more realistic radiative cooling model
Lei Ni, Vyacheslav S. Lukin, Nicholas A. Murphy +1
Magnetic reconnection is the most likely mechanism responsible for the high temperature events that are observed in strongly magnetized locations around the temperature minimum in…
Numerical Studies of the Kelvin-Hemholtz Instability in the Coronal Jet
Tianle Zhao, Lei Ni, Jun Lin +1
The Kelvin-Hemholtz (K-H) instability in the corona EUV jet is studied via 2.5 MHD numerical simulations. The jet results from magnetic reconnection due to the interation of the ne…
Frequently Occurring Reconnection Jets from Sunspot Light Bridges
Hui Tian, Vasyl Yurchyshyn, Hardi Peter +12
Solid evidence of magnetic reconnection is rarely reported within sunspots, the darkest regions with the strongest magnetic fields and lowest temperatures in the solar atmosphere.…
Magnetic reconnection in strongly magnetized regions of the low solar chromosphere
Lei Ni, Vyacheslav S. Lukin, Nicholas A. Murphy +1
Magnetic reconnection in strongly magnetized regions around the temperature minimum region of the low solar atmosphere is studied by employing MHD-based simulations of a partially…
Blob formation and ejection in coronal jets due to the plasmoid and Kelvin-Helmholtz instabilities
Lei Ni, Qing-Min Zhang, Nicholas A. Murphy +1
We perform two-dimensional resistive magnetohydrodynamic simulations of coronal jets driven by flux emergence along the lower boundary. The reconnection layers are susceptible the…
Heating mechanisms in the low solar atmosphere through magnetic reconnection in current sheets
Lei Ni, Jun Lin, Ilia I. Roussev +1
We simulate several magnetic reconnection processes in the low solar chromosphere/photosphere, the radiation cooling, heat conduction and ambipolar diffusion are all included. Our…