Magnetic field

Efficient and Automated Inversions of Magnetically-Sensitive Forbidden Coronal Lines: CLEDB - The Coronal Line Emission DataBase Magnetic Field Inversion Algorithm

CLEDB 2-line magnetic inversion algorithm flowchart.
Wednesday, June 22, 2022

Alin Paraschiv and Philip Judge present CLEDB, a single point inversion algorithm for determining magnetic parameters using spectro-polarimetric measurements of emission lines formed in the solar corona.

Optimal spectral lines for measuring chromospheric magnetic fields

The solar spectrum seen at low resolution
Wednesday, June 22, 2022

This paper identifies spectral lines from EUV to infrared wavelengths which are optimally suited to measuring vector magnetic fields as high as possible in the solar atmosphere.

ON THE (MIS)INTERPRETATION OF THE SCATTERING POLARIZATION SIGNATURES IN THE CA II 8542 A LINE THROUGH SPECTRAL LINE INVERSIONS

Data points in six panels
Friday, June 17, 2022

Scattering polarization tends to dominate the linear polarization signals of the Ca II 8542 A line in weakly magnetized areas (B ~ 100 G), especially when the observing geometry is close to the limb.

Haonan Wu

Haonan Wu is a graduate student in the Department of Physics and Astronomy at Clemson University. His research focuses on the ionosphere-thermosphere interactions during magnetic storm time using numerical models.

Impacts of Different Causes on the Inter–Hemispheric Asymmetry of Ionosphere–Thermosphere System at Mid– and High–Latitudes: GITM Simulations

Multiple circular diagrams comparing aligned dipole with IGRG
Tuesday, March 29, 2022

There are significant differences between the Earth’s two hemispheres such as the Earth's magnetic field and the intensity of solar radiation due to Earth's tilt of the rotation axis with respect to the Sun.

Magnetic fields in the solar convection zone (major update)

Colorful swirling magnetic field lines
Tuesday, March 29, 2022

It has been a prevailing picture that active regions on the solar surface originate from a strong toroidal magnetic field stored in the overshoot region at the base of the solar convection zone, generated by a deep seated solar dynamo mechanism.

The dimmest state of the Sun

A and B line graphs depicting measured and modelled total solar irradiance
Tuesday, March 1, 2022

How the solar electromagnetic energy entering the Earth’s atmosphere varied since pre-industrial times is an important consideration in the climate change debate.

Natalia Nikolayevna Stepanian (1931–2018)

Natalia Nikolayevna Stepanian lived until age 87 and was the oldest researcher at the Crimean Astrophysical Observatory (CrAO) when she died following a long illness.

The enduring mystery of the solar corona

Magnetic field lines
Thursday, September 16, 2021

The author reviews why, after almost 8 decades, we still have a coronal heating problem.

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