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The Solar Origin of an In Situ Type III Radio Burst Event
Meiqi Wang, Bin Chen, Sijie Yu +4
Solar type III radio bursts are generated by beams of energetic electrons that travel along open magnetic field lines through the corona and into interplanetary space. However, und…
Particle acceleration in solar flares with imaging-spectroscopy in soft X-rays
Mitsuo Oka, Amir Caspi, Bin Chen +15
Particles are accelerated to very high, non-thermal energies during explosive energy-release phenomena in space, solar, and astrophysical plasma environments. In the case of solar…
Microwave Imaging of Quasi-periodic Pulsations at Flare Current Sheet
Yuankun Kou, Xin Cheng, Yulei Wang +4
Quasi-periodic pulsations (QPPs) are frequently detected in solar and stellar flares, but the underlying physical mechanisms are still to be ascertained. Here, we show microwave QP…
Numerical Modeling of Energetic Electron Acceleration, Transport, and Emission in Solar Flares: Connecting Loop-top and Footpoint Hard X-Ray Sources
Xiangliang Kong, Bin Chen, Fan Guo +8
The acceleration and transport of energetic electrons during solar flares is one of the outstanding topics in solar physics. Recent X-ray and radio imaging and spectroscopy observa…
Non-thermal Broadening of IRIS Fe XXI Lines Caused by Turbulent Plasma Flows in the Magnetic Reconnection Region During Solar Eruptions
Chengcai Shen, Vanessa Polito, Katharine K. Reeves +3
Magnetic reconnection is the key mechanism for energy release in solar eruptions, where the high-temperature emission is the primary diagnostic for investigating the plasma propert…
Modeling Electron Acceleration and Transport in the Early Impulsive Phase of the 2017 September 10 Solar Flare
Xiaocan Li, Fan Guo, Bin Chen +2
The X8.2-class limb flare on September 10, 2017 is among the best studied solar flare events owing to its great similarity to the standard flare model and the broad coverage by mul…
Implications for additional plasma heating driving the extreme-ultraviolet late phase of a solar flare with microwave imaging spectroscopy
Jiale Zhang, Bin Chen, Sijie Yu +6
Extreme-ultraviolet late phase (ELP) refers to the second extreme-ultraviolet (EUV) radiation enhancement observed in certain solar flares, which usually occurs tens of minutes to…
A model of double coronal hard X-ray sources in solar flares
Xiangliang Kong, Jing Ye, Bin Chen +6
A number of double coronal X-ray sources have been observed during solar flares by RHESSI, where the two sources reside at different sides of the inferred reconnection site. Howeve…
The Origin of Underdense Plasma Downflows Associated with Magnetic Reconnection in Solar Flares
Chengcai Shen, Bin Chen, Katharine K. Reeves +3
Magnetic reconnection is a universal process that powers explosive energy release events such as solar flares, geomagnetic substorms, and some astrophysical jets. A characteristic…
Plasma Heating Induced by Tadpole-Like Downflows in the Flaring Solar Corona
Tanmoy Samanta, Hui Tian, Bin Chen +4
As one of the most spectacular energy release events in the solar system, solar flares are generally powered by magnetic reconnection in the solar corona. As a result of the re-arr…
Imaging Spectroscopy of CME-Associated Solar Radio Bursts
Sherry Chhabra, Dale E. Gary, Gregg Hallinan +4
We present first results of a solar radio event observed with the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) at metric wavelengths. We examine a complex event…
Measurement of magnetic field and relativistic electrons along a solar flare current sheet
Bin Chen, Chengcai Shen, Dale E. Gary +8
In the standard model of solar flares, a large-scale reconnection current sheet is postulated as the central engine for powering the flare energy release and accelerating particles…
Evolution of Flare-accelerated Electrons Quantified by Spatially Resolved Analysis
Natsuha Kuroda, Gregory D. Fleishman, Dale E. Gary +3
Nonthermal electrons accelerated in solar flares produce electromagnetic emission in two distinct, highly complementary domains - hard X-rays (HXRs) and microwaves (MWs). This pape…
Accelerated electrons observed down to <7 keV in a NuSTAR solar microflare
Lindsay Glesener, S"am Krucker, Jessie Duncan +6
We report the detection of emission from a non-thermal electron distribution in a small solar microflare (GOES class A5.7) observed by the Nuclear Spectroscopic Telescope Array (Nu…
Drifting Pulsation Structure at the Very Beginning of the 2017 September 10 Limb Flare
M. Karlicky, B. Chen, D. E. Gary +2
Drifting pulsation structures (DPSs) are important radio fine structures usually observed at the beginning of eruptive solar flares. It has been suggested that DPSs carry important…
Diagnostics of Space Weather Drivers Enabled by Radio Observations
Tim Bastian, Hazel Bain, Bin Chen +6
The Sun is an active star that can have a direct impact on the Earth, its magnetosphere, and the technological infrastructure on which modern society depends. Among the phenomena t…
Astro2020 Science White Paper: Probing Magnetic Reconnection in Solar Flares - New Perspectives from Radio Dynamic Imaging Spectroscopy
Bin Chen, Tim Bastian, Joel Dahlin +9
Magnetic reconnection is a fundamental physical process in many laboratory, space, and astrophysical plasma contexts. Solar flares serve as an outstanding laboratory to study the m…
Possible Detection of Subsecond-period Propagating Magnetohydrodynamics Waves in Post-reconnection Magnetic Loops during a Two-ribbon Solar Flare
Sijie Yu, Bin Chen
Solar flares involve the sudden release of magnetic energy in the solar corona. Accelerated nonthermal electrons have often been invoked as the primary means for transporting the b…
The Dynamical Behavior of Reconnection-driven Termination Shocks in Solar Flares: Magnetohydrodynamic Simulations
Chengcai Shen, Xiangliang Kong, Fan Guo +2
In eruptive solar flares, termination shocks (TSs), formed when high-speed reconnection outflows collide with closed dense flaring loops, are believed to be one of the possible can…
Science with an ngVLA: Radio Observations of Solar Flares
Dale E. Gary, Timothy S. Bastian, Bin Chen +2
Solar flares are due to the catastrophic release of magnetic energy in the Sun's corona, resulting in plasma heating, mass motions, particle acceleration, and radiation emitted fro…
Magnetic Reconnection Null Points as the Origin of Semi-relativistic Electron Beams in a Solar Jet
Bin Chen, Sijie Yu, Marina Battaglia +7
Magnetic reconnection, the central engine that powers explosive phenomena throughout the Universe, is also perceived as one of the principal mechanisms for accelerating particles t…
Broad Non-Gaussian Fe XXIV Line Profiles in the Impulsive Phase of the 2017 September 10 X8.3 class Flare Observed by Hinode/EIS
Vanessa Polito, Jaroslav Dudík, Jana Kašparová +4
We analyze the spectra of high temperature \fexxiv~lines observed by \emph{Hinode}/EIS during the impulsive phase of the X8.3--class flare on September 10, 2017. The line profiles…
Microwave and Hard X-Ray Observations of the 2017 September 10 Solar Limb Flare
Dale E. Gary, Bin Chen, Brian R. Dennis +8
We report the first science results from the newly completed Expanded Owens Valley Solar Array (EOVSA), which obtained excellent microwave imaging spectroscopy observations of SOL2…
Dynamic Spectral Imaging of Decimetric Fiber Bursts in an Eruptive Solar Flare
Zhitao Wang, Bin Chen, Dale E. Gary
Fiber bursts are a type of fine structure that is often superposed on type IV radio continuum emission during solar flares. Although studied for many decades, its physical exciter,…