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Non-Neutralized Electric Current of Active Regions Explained as a Projection Effect
Xudong Sun, Mark C. M. Cheung
Active regions (ARs) often possess an observed net electric current in a single magnetic polarity. We show that such "non-neutralized" currents can arise from a geometric projectio…
Sun-as-a-star Spectral Irradiance Observations of Transiting Active Regions
Shin Toriumi, Vladimir S. Airapetian, Hugh S. Hudson +3
Major solar flares are prone to occur in active region atmospheres associated with large, complex, dynamically-evolving sunspots. This points to the importance of monitoring the ev…
Solar wind prediction using deep learning
Vishal Upendran, M. C. M Cheung, Shravan Hanasoge +1
Emanating from the base of the Sun's corona, the solar wind fills the interplanetary medium with a magnetized stream of charged particles whose interaction with the Earth's magneto…
The Coronal Global Evolutionary Model: Using HMI Vector Magnetogram and Doppler Data to Determine Coronal Magnetic Field Evolution
J. Todd Hoeksema, William P. Abbett, David J. Bercik +10
The Coronal Global Evolutionary Model (CGEM) provides data-driven simulations of the magnetic field in the solar corona to better understand the build-up of magnetic energy that le…
Coronal Dimming as a Proxy for Stellar Coronal Mass Ejections
Meng Jin, Mark C. M. Cheung, Marc L. DeRosa +6
Solar coronal dimmings have been observed extensively in the past two decades and are believed to have close association with coronal mass ejections (CMEs). Recent study found that…
Comparative Study of Data-driven Solar Coronal Field Models Using a Flux Emergence Simulation as a Ground-truth Data Set
Shin Toriumi, Shinsuke Takasao, Mark C. M. Cheung +4
For a better understanding of magnetic field in the solar corona and dynamic activities such as flares and coronal mass ejections, it is crucial to measure the time-evolving corona…