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High-frequency Alfven waves in multi-ion coronal plasma : observational implications [PDF]
, 2005 We investigate the effects of high-frequency (of order ion gyrofrequency) Alfvén and ion-cyclotron waves on ion emission lines by studying the dispersion of these waves in a multi-ion coronal plasma.
Ofman, L. (Leon) +3 more
core +1 more source
Solar Transient Events and their Importance for Coronal Heating
Science Progress, 2004 Over the last decade, the uninterrupted high resolution coverage of the Sun both from the excellent range of telescopes aboard many spacecrafts and from ground-based instruments has led to a wealth of observations of small-scale dynamic events observed from the chromosphere to the transition region and corona.
J Gerry, Doyle, Maria S, Madjarska
openaire +2 more sources
ALFVÉN WAVE SOLAR MODEL (AWSoM): CORONAL HEATING [PDF]
The Astrophysical Journal, 2014 We present a new version of the Alfven Wave Solar Model (AWSoM), a global model from the upper chromosphere to the corona and the heliosphere. The coronal heating and solar wind acceleration are addressed with low-frequency Alfven wave turbulence. The injection of Alfven wave energy at the inner boundary is such that the Poynting flux is proportional ...
van der Holst, Bart +6 more
openaire +2 more sources
Photospheric magnetic vortex structures [PDF]
, 2011 Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere.
Shelyag, S. +14 more
core +1 more source
Research progress in coronal magnetic field measurements
地球与行星物理论评, 2022 Different solar atmospheric layers are connected by the magnetic field of the Sun, which is the primary source for various types of solar activity. The magnetic activity of the Sun has a significant impact on the solar-terrestrial environment and human ...
Zihao Yang +6 more
doaj +1 more source
A Cancellation Nanoflare Model for Solar Chromospheric and Coronal Heating [PDF]
The Astrophysical Journal Letters, 2018 Abstract Nanoflare models for heating the solar corona usually assume magnetic braiding and reconnection as the source of the energy. However, recent observations at record spatial resolution from the Sunrise balloon mission suggest that photospheric magnetic flux cancellation is much more common than previously realized.
E. R. Priest, L. P. Chitta, P. Syntelis
openaire +5 more sources
The Astrophysical Journal, 2023 The EUI instrument on the Solar Orbiter spacecraft has obtained the most stable, high-resolution images of the solar corona from its orbit with a perihelion near 0.4 au.
P. G. Judge
doaj +1 more source
Multifrequency Microwave Imaging of Weak Transients from the Quiet Solar Corona
The Astrophysical Journal, 2023 Understanding the dynamics of the quiet solar corona is important for answering key questions including the coronal heating problem. Multiple studies have suggested small-scale magnetic-reconnection events may play a crucial role.
Surajit Mondal, Bin Chen, Sijie Yu
doaj +1 more source
The Sun's global photospheric and coronal magnetic fields : observations and models [PDF]
, 2012 2012LRSP....9....6M Funding: STFC, the Leverhulme Trust and European Commission’s Seventh Framework Programme (FP7/2007-2013) under the grant agreement SWIFF (project no.
Anthony Yeates +5 more
core +1 more source
Observational signatures of waves and flows in the solar corona [PDF]
, 2015 DM acknowledges support of a Royal Society University Research Fellowship and a KU Leuven Research Council senior research fellowship (SF/12/008). The research leading to these results has also received funding from the European Commission Seventh ...
Antolin, Patrick +3 more
core +1 more source