From UKSP Nugget

88. Excitation of coronal loop oscillations by coronal rain

Author: Petra Kohutova and Erwin Verwichte at the University of Warwick.

<< previous nuggetnext nugget >>

A little bit of background

Coronal rain is a common phenomenon occurring in active region coronal loops. As the name suggests, it shares many parallels with its terrestrial counterpart; it consists of cool plasma condensations falling from coronal heights towards the solar surface guided by magnetic field lines.… continue to the full article

Read more

87. Giant solar loops and LOFAR radio observations

Author: Hamish Reid and Eduard Kontar
Astronomy and Astrophysics Group, University of Glasgow.

<< previous nuggetnext nugget >>

Introduction

Solar flares accelerate particles that then produce radio emission as they move through the corona. Type III radio bursts are commonly observed signatures of electron beams propagating along magnetic field that extends into interplanetary space.… continue to the full article

Read more

85. The role of the magnetic field in sunquakes

Author: Lucie Green, Gherardo Valori, Francesco Zuccarello, Sarah Matthews at MSSL UCL, Sergei Zharkov at University of Hull and Salvo Guglielmino at Università degli Studi di Catania.

<< previous nuggetnext nugget >>

Introduction

Sunquakes are sporadic bursts of sound waves that are generated at the surface of the Sun as a side-effect of solar flares and coronal mass ejections.… continue to the full article

Read more

83. Beam electrons as sources of Hα ribbons in a C-class flare

Author: Valentina Zharkova, Malcolm Druett and Eamon Scullion at the University of Northumbria.

<< previous nuggetnext nugget >>

Introduction

Observations of solar flare onsets show a rapid increase of hard and soft X-rays, ultra-violet emission with large Doppler blue-shifts associated with plasma upflows, and Hα emission with red-shifts up to 1–4 Å [1, 2, 3].… continue to the full article

Read more