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Photographic image of Mausumi Dikpati, senior scientist at HAO
Mausumi Dikpati Publication is Featured by AAS Nova
December 15, 2020

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

Photographic image of Peter Gilman
Congratulations to Peter Gilman, elected AAS Legacy fellow!
December 9, 2020

Senior Scientist Emeritus Peter Gilman has received the newly established Fellow of the American Astronomical Society (AAS) award.

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Publication Highlights

Graphic image of active-regions' toroid patterns
Deciphering Deep-Origin of Active Regions From Analysis Of Magnetograms
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.

Graphic depicting root-mean-square difference of the plasma drift
Data-Driven Ensemble Modeling of Equatorial Ionospheric Electrodynamics
February 4, 2021

A Case Study During a Minor Storm Period Under Solar Minimum Conditions: The dayside equatorial ionospheric electrodynamics exhibits strong variability driven simultaneously by highly changeable external forcings that originate from the Sun, magnetosphere, and lower atmosphere.

Graphic image depicting spectro-polarimetric data
Design of a Highly Efficient Polychromatic Full-Stokes Polarization Modulator for the CRISP Imaging Spectrometer
February 2, 2021

In 2014 HAO built a polarimetric modulator for the CRISP instrument on the Swedish 1-m Solar Telescope in La Palma, using the principles of polychromatic modulation previously developed by HAO scientists. This paper discusses the processes by which the modulator was designed, built, and tested.

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