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All Outputs (12)

Impact of Anomalous Active Regions on the Large-scale Magnetic Field of the Sun (2023)
Journal Article
Pal, S., Bhowmik, P., Mahajan, S. S., & Nandy, D. (2023). Impact of Anomalous Active Regions on the Large-scale Magnetic Field of the Sun. Astrophysical Journal, 953(1), Article 51. https://doi.org/10.3847/1538-4357/acd77e

One of the major sources of perturbation in the solar cycle amplitude is believed to be the emergence of anomalous active regions that do not obey Hale's polarity law and Joy's law of tilt angles. Anomalous regions containing high magnetic flux that... Read More about Impact of Anomalous Active Regions on the Large-scale Magnetic Field of the Sun.

Physical Models for Solar Cycle Predictions (2023)
Journal Article
Bhowmik, P., Jiang, J., Upton, L., Lemerle, A., & Nandy, D. (2023). Physical Models for Solar Cycle Predictions. Space Science Reviews, 219(5), Article 40. https://doi.org/10.1007/s11214-023-00983-x

The dynamic activity of stars such as the Sun influences (exo)planetary space environments through modulation of stellar radiation, plasma wind, particle and magnetic fluxes. Energetic solar-stellar phenomena such as flares and coronal mass ejections... Read More about Physical Models for Solar Cycle Predictions.

Causality in heliophysics: Magnetic fields as a bridge between the Sun’s interior and the Earth’s space environment (2023)
Journal Article
Nandy, D., Baruah, Y., Bhowmik, P., Dash, S., Gupta, S., Hazra, S., …Sinha, S. (2023). Causality in heliophysics: Magnetic fields as a bridge between the Sun’s interior and the Earth’s space environment. Journal of Atmospheric and Solar-Terrestrial Physics, 248, Article 106081. https://doi.org/10.1016/j.jastp.2023.106081

Our host star, the Sun, is a middle-aged main sequence G type star whose activity varies. These variations are primarily governed by solar magnetic fields which are produced in the Sun’s interior via a magnetohydrodynamic dynamo mechanism. Solar acti... Read More about Causality in heliophysics: Magnetic fields as a bridge between the Sun’s interior and the Earth’s space environment.

Automated driving for global non-potential simulations of the solar corona (2022)
Journal Article
Yeates, A., & Bhowmik, P. (2022). Automated driving for global non-potential simulations of the solar corona. Astrophysical Journal, 935(1), Article 13. https://doi.org/10.3847/1538-4357/ac7de4

We describe a new automated technique for active region emergence in coronal magnetic field models, based on the inversion of the electric field locally from a single line-of-sight magnetogram for each region. The technique preserves the arbitrary sh... Read More about Automated driving for global non-potential simulations of the solar corona.

Exploring the Origin of Stealth Coronal Mass Ejections with Magnetofrictional Simulations (2022)
Journal Article
Bhowmik, P., Yeates, A., & Rice, O. (2022). Exploring the Origin of Stealth Coronal Mass Ejections with Magnetofrictional Simulations. Solar Physics, 297(3), Article 41. https://doi.org/10.1007/s11207-022-01974-x

Coronal mass ejections (CMEs) – among the most energetic events originating from the Sun – can cause significant and sudden disruption to the magnetic and particulate environment of the heliosphere. Thus, in the current era of space-based technologie... Read More about Exploring the Origin of Stealth Coronal Mass Ejections with Magnetofrictional Simulations.

Two Classes of Eruptive Events During Solar Minimum (2021)
Journal Article
Bhowmik, P., & Yeates, A. (2021). Two Classes of Eruptive Events During Solar Minimum. Solar Physics, 296(7), Article 109. https://doi.org/10.1007/s11207-021-01845-x

During solar minimum, the Sun is relatively inactive with few sunspots observed on the solar surface. Consequently, we observe a smaller number of highly energetic events such as solar flares or coronal mass ejections (CMEs), which are often associat... Read More about Two Classes of Eruptive Events During Solar Minimum.

Prediction of the Sun's Coronal Magnetic Field and Forward-modeled Polarization Characteristics for the 2019 July 2 Total Solar Eclipse (2020)
Journal Article
Dash, S., Bhowmik, P., B S, A., Ghosh, N., & Nandy, D. (2020). Prediction of the Sun's Coronal Magnetic Field and Forward-modeled Polarization Characteristics for the 2019 July 2 Total Solar Eclipse. Astronomical Journal, 890(1), Article 37. https://doi.org/10.3847/1538-4357/ab6a91

On 2019 July 2 a total solar eclipse—visible across parts of the Southern Pacific Ocean, Chile, and Argentina—enabled observations of the Sun's corona. The structure and emission characteristics of the corona are determined by underlying magnetic fie... Read More about Prediction of the Sun's Coronal Magnetic Field and Forward-modeled Polarization Characteristics for the 2019 July 2 Total Solar Eclipse.

Polar flux imbalance at the sunspot cycle minimum governs hemispheric asymmetry in the following cycle (2019)
Journal Article
Bhowmik, P. (2019). Polar flux imbalance at the sunspot cycle minimum governs hemispheric asymmetry in the following cycle. Astronomy & Astrophysics, 632, Article A117. https://doi.org/10.1051/0004-6361/201834425

Aims. Hemispheric irregularities of solar magnetic activity is a well-observed phenomenon, the origin of which has been studied through numerical simulations and data analysis techniques. In this work we explore possible causes generating north-south... Read More about Polar flux imbalance at the sunspot cycle minimum governs hemispheric asymmetry in the following cycle.

The Large-scale Coronal Structure of the 2017 August 21 Great American Eclipse: An Assessment of Solar Surface Flux Transport Model Enabled Predictions and Observations (2018)
Journal Article
Nandy, D., Bhowmik, P., Yeates, A. R., Panda, S., Tarafder, R., & Dash, S. (2018). The Large-scale Coronal Structure of the 2017 August 21 Great American Eclipse: An Assessment of Solar Surface Flux Transport Model Enabled Predictions and Observations. Astrophysical Journal, 853(1), Article 72. https://doi.org/10.3847/1538-4357/aaa1eb

On 2017 August 21, a total solar eclipse swept across the contiguous United States, providing excellent opportunities for diagnostics of the Sun's corona. The Sun's coronal structure is notoriously difficult to observe except during solar eclipses; t... Read More about The Large-scale Coronal Structure of the 2017 August 21 Great American Eclipse: An Assessment of Solar Surface Flux Transport Model Enabled Predictions and Observations.