Solar Flares

Energetic Electrons Accelerated and Trapped in a Magnetic Bottle above a Solar Flare Arcade

Where and how flares efficiently accelerate charged particles remains an unresolved question. Recent studies revealed that a \"magnetic bottle\" structure, which forms near the bottom of a large-scale reconnection current sheet above the flare …

A Joint Microwave and Hard X-Ray Study toward Understanding the Transport of Accelerated Electrons During an Eruptive Solar Flare

The standard flare model, despite its success, is limited in comprehensively explaining the various processes involving nonthermal particles. One such missing ingredient is a detailed understanding of the various processes involved during the …

Episodic Energy Release during the Main and Post-impulsive Phases of a Solar Flare

When and where the magnetic field energy is released and converted in eruptive solar flares remains an outstanding topic in solar physics. To shed light on this question, here we report multiwavelength observations of a C9.4-class eruptive limb flare …

New study published in Nature Astronomy

We have a new study [published in Nature Astronomy](https://www.nature.com/articles/s41550-023-02122-6). The study, led by Dr. Sijie Yu of our group, presents aurora-like radio bursts above a Sunspot with the Karl G. Jansky Very Large Array. The results may have profound implications on the interpretation of similar bursts observed on other stars. See press release story [at this link](https://news.njit.edu/njit-scientists-uncover-aurora-radio-emission-above-sunspot).

The Solar Origin of an In Situ Type III Radio Burst Event

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, understanding the source of these electrons and how they escape into …

Multiple Regions of Nonthermal Quasiperiodic Pulsations during the Impulsive Phase of a Solar Flare

Flare-associated quasiperiodic pulsations (QPPs) in radio and X-ray wavelengths, particularly those related to nonthermal electrons, contain important information about the energy release and transport processes during flares. However, the paucity of …

A Model of Double Coronal Hard X-Ray Sources in Solar Flares

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. However, where and how these X-ray-emitting electrons are accelerated …

New study published in Nature

We have a new study [published in Nature](https://www.nature.com/articles/s41586-022-04728-8). The study reveals a region in a solar flare in which nearly all the available source electrons are accelerated into high, non-thermal energies.

Modeling Electron Acceleration and Transport in the Early Impulsive Phase of the 2017 September 10th Solar Flare

The X8.2-class limb flare on 2017 September 10 is among the best studied solar flare events owing to its great similarity to the standard flare model and the broad coverage by multiple spacecraft and ground-based observations. These multiwavelength …

Shocked and Accelerated

A series of studies using data from the [Karl G. Jansky Very Large Array](https://science.nrao.edu/facilities/vla/) have revealed a special type of shocks, called "termination shocks", as an outstanding candidate for particle acceleration in the core solar flare region.