Mausumi Dikpati

Dynamical Splitting Of A Spot-producing Magnetic Ring In A Nonlinear Shallow-water Model

Snapshots during splitting of a 6-degree toroidal ring into two
Wednesday, June 30, 2021

We explore the fundamental physics of narrow toroidal rings during their nonlinear magnetohydrodynamic evolution at tachocline depths. Using a shallow-water model, we simulate the nonlinear evolution of spot-producing toroidal rings of 6-degree latitudinal width and peak field of 15 kG.

Simulating Properties of “Seasonal” Variability in Solar Activity And Space Weather Impacts

The Van-Allen Radiation belt electron
Wednesday, April 21, 2021

Solar short-term, quasi-annual variability within a decadal sunspot-cycle has recently been observed to strongly correlate with major class solar flares, resulting into quasi-periodic space weather “seasons”.

Measuring the magnetic origins of solar flares, CMEs and Space Weather

A UV spectrum of α Cen A
Wednesday, April 21, 2021

We take a broad look at the problem of identifying the magnetic solar causes of space weather.

Deciphering Deep-Origin of Active Regions From Analysis Of Magnetograms

Graphic image of active-regions' toroid patterns
Tuesday, February 23, 2021

Dikpati, et. al., derive magnetic toroids from surface magnetograms by employing a novel optimization method based on Trust Region Reflective algorithm. Toroids obtained are combinations of Fourier modes (amplitudes and phases) with low longitudinal wavenumbers.

Mausumi Dikpati Publication is Featured by AAS Nova

Mausumi Dikpati, senior scientist at HAO

A recent publication by Mausumi Dikpati was featured by AAS Nova in November 2020.

Physics Of MHD Rossby Waves In The Sun

Graphic image of the physics Of MHD Rossby Waves In The Sun
Wednesday, June 10, 2020

Evidence of the existence of hydrodynamic and MHD Rossby waves in the Sun is accumulating rapidly.

Space Weather Challenge & Forecasting Implications Of Rossby Waves

Graph depicting solar magnetic weather
Tuesday, March 31, 2020

Rossby waves arise in thin layers within fluid regions of stars and planets. These global wave-like patterns occur due to the variation in Coriolis forces with latitude. In the past several years observational evidence has indicated that there are also Rossby waves in the Sun.

Mausumi Dikpati Interviewed Live by Astronomy & Space

Photograph of Mausumi Dikpati, senior scientist at HAO

Mausumi Dikpati is a senior scientist at HAO. She studies the dynamics between Rossby waves and solar activity such as flares and coronal mass ejections (CMEs).

Triggering the Birth of New Cycle's Sunspots by Solar Tsunami

Image depicting global tachocline fluid top surface deformations
Monday, February 18, 2019

We demonstrate a novel physical mechanism, namely, that a “solar tsunami” occurring in the Sun’s interior shear-fluid layer can trigger new cycle’s magnetic flux emergence at high latitudes, a few weeks after the cessation of old cycle’s flux emergence near the equator.

Magnetic tsunami in the Sun triggers new space weather events in 2020

Image of global tachocline fluid top surface deformations

Most people have heard about tsunamis in the Earth’s oceans. Those occur when large masses of water get violently moved at the ocean floor, as a result of earthquakes or volcanic eruptions.

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