Solar Flares

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).

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.

Radio Spectral Imaging of an M8.4 Eruptive Solar Flare: Possible Evidence of a Termination Shock

Solar flare termination shocks have been suggested as one of the viable mechanisms for accelerating electrons and ions to high energies. Observational evidence of such shocks, however, remains rare. Using radio dynamic spectroscopic imaging of a …

Radio Spectral Imaging of an M8.4 Eruptive Solar Flare: Possible Evidence of a Termination Shock

Solar flare termination shocks have been suggested as one of the viable mechanisms for accelerating electrons and ions to high energies. Observational evidence of such shocks, however, remains rare. Using radio dynamic spectroscopic imaging of a …

Energetic Electron Distribution of the Coronal Acceleration Region: First Results from Joint Microwave and Hard X-Ray Imaging Spectroscopy

Nonthermal sources located above bright flare arcades, referred to as the ``above-the-loop-top'' sources, have been often suggested as the primary electron acceleration site in major solar flares. The X8.2 limb flare on 2017 September 10 features …

Energetic Electron Distribution of the Coronal Acceleration Region: First Results from Joint Microwave and Hard X-Ray Imaging Spectroscopy

Nonthermal sources located above bright flare arcades, referred to as the ``above-the-loop-top'' sources, have been often suggested as the primary electron acceleration site in major solar flares. The X8.2 limb flare on 2017 September 10 features …