HAO Research Highlights

Graphic chart depicting mean vertical magnetic field strength
May 8, 2020

While the quiet Sun magnetic field shows only little variation with the solar cycle, long-term variations cannot be completely ruled out from first principles.

Graphic image depicting radial profiles of continuum intensity
May 8, 2020

The analyses of sunspot observations revealed a fundamental magnetic property of the umbral boundary, the invariance of the vertical component of the magnetic field.

Graphic image of H+ band Electromagnetic Ion Cyclotron (EMIC) waves diagram
April 24, 2020

A recent statistical study has suggested that not all electromagnetic ion cyclotron (EMIC) waves can scatter relativistic electrons. However, knowledge of the factors that influence the EMIC wave scattering efficiency is still limited in observations.

Fully processed image of the corona generated by stacking many co-aligned, calibrated images
April 14, 2020

NASA's WB-57 High Altitude Research Program provides a deployable, mobile, stratospheric platform for scientic research.

Graphic image of opposite polarity magnetic fields
March 31, 2020

Recent numerical simulations and observations of sunspots show a significant amount of opposite polarity magnetic fields within the sunspot penumbra. Most of the opposite polarity fields are associated with convective downflows.