A.-M. Broomhall, W.J. Chaplin, Y. Elsworth,
University of Birmingham
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Introduction
The Sun is a variable star whose observed magnetic activity varies on a timescale of about 11 years and impacts life on Earth. The Sun’s magnetic field originates in the solar interior and global helioseismology, which studies the Sun’s natural resonant oscillations (p modes), offers a unique opportunity to probe conditions beneath the solar surface.… continue to the full article
Author: Eamon Scullion*,†, Robert Erdélyi*, Victor Fedun* and Gerry Doyle†,
*University of Sheffield and †Armagh Observatory
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Introduction
Wave-driven phenomena are fundamental for the energetics and dynamics of the atmosphere of the Sun.… continue to the full article
Authors: Rebecca White and Erwin Verwichte, Centre for Fusion, Space & Astrophysics, Physics Department at the University of Warwick.
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Introduction
Knowledge of the physical conditions in the corona and coronal parameters such as magnetic field strengths are key to understanding the mechanisms behind such phenomena as coronal heating and the solar wind acceleration, which have direct consequences towards the impact of space weather on Earth.… continue to the full article
Author: Youra Taroyan is from the Solar System Physics Group at Aberystwyth University.
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Introduction
Magnetohydrodynamic (MHD) instabilities play a key role in a number of processes occurring in the Sun and in the solar-terrestrial environment: small perturbations become exponentially amplified leading to large scale changes in the system.… continue to the full article
Author: S. Regnier, R. W. Walsh and C. E. Alexander at the Jeremiah Horrocks Institute, University of Central Lancashire, Preston
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Introduction
Cavities have been observed above the solar limb for a long time using white-light coronographs (e.… continue to the full article
Authors: Karen Meyer and Duncan Mackay are from the University of St Andrews, and Aad van Ballegooijen is from the Harvard-Smithsonian Center for Astrophysics.
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Introduction
The magnetic carpet is the small-scale photospheric magnetic field of the quiet Sun.… continue to the full article
Authors: David Graham, Lyndsay Fletcher & Iain Hannah
are from the Astronomy & Astrophysics Group at the University of Glasgow
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Introduction
The mechanisms behind the energy release in a solar flare, and its transport to the lower atmosphere, are still widely debated.… continue to the full article
Author: Michael Bareford and Philippa Browning are from the Jodrell Bank Centre for Astrophysics, University of Manchester and Ronald Van der Linden is from the Royal Observatory of Belgium.
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Introduction
The million-degree temperatures observed in the outer atmosphere of the Sun are considerably hotter than that of the photosphere (T ≈ 5800 K).… continue to the full article
Authors: Peter Gallagher, Pietro Zucca, Eoin Carley and Joe McCauley are members of the Astrophysics Research Group at Trinity College Dublin, Ireland.
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Introduction
Coronal mass ejections (CMEs) are spectacular eruptions of plasma and magnetic field from the surface of the Sun into the heliosphere.… continue to the full article
Authors: Sarah Matthews, Sergei Zharkov & Valentina Zharkova
UCL Mullard Space Science Lab. and University of Bradford
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Introduction
The quest to understand the energy release and transport processes in solar flares is one that many solar physicists have taken up over the years, and since the advent of routine space-based observations we have learned huge amounts about the processes that might be operating in the upper atmosphere.… continue to the full article
