Long-period intensity pulsations in the solar corona during activity cycle 23 [PDF]
Astronomy & Astrophysics, 2014 We report on the detection (10 ) of 917 events of long-period (3 to 16 hours) intensity pulsations in the 19.5 nm passband of the SOHO Extreme ultraviolet Imaging Telescope. The data set spans from January 1997 to July 2010, i.e the entire solar cycle 23 and the beginning of cycle 24.
Auchère, F. +3 more
openaire +2 more sources
ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications
Journal of Space Weather and Space Climate, 2021 Radio bursts are sensitive tracers of non-thermal electron populations in the solar corona. They are produced by electron beams and shock waves propagating through the corona and the heliosphere, and by trapped electron populations in coronal mass ...
Hamini Abdallah +10 more
doaj +1 more source
Conditions for electron-cyclotron maser emission in the solar corona
, 2016 Context. The Sun is an active source of radio emission ranging from long duration radio bursts associated with solar flares and coronal mass ejections to more complex, short duration radio bursts such as solar S bursts, radio spikes and fibre bursts ...
Bloomfield, D. S. +3 more
core +1 more source
Solar Dynamics Observatory discovers thin high temperature strands in coronal active regions [PDF]
, 2011 One scenario proposed to explain the million degrees solar corona is a finely-stranded corona where each strand is heated by a rapid pulse. However, such fine structure has neither been resolved through direct imaging observations nor conclusively shown ...
Aschwanden +13 more
core +2 more sources
A nanoflare model for active region radiance: application of artificial neural networks
, 2008 Context. Nanoflares are small impulsive bursts of energy that blend with and possibly make up much of the solar background emission. Determining their frequency and energy input is central to understanding the heating of the solar corona.
Andreon +29 more
core +1 more source
Fifteen years in the high-energy life of the solar-type star HD 81809. XMM-Newton observations of a stellar activity cycle [PDF]
, 2017 Aims. The data set of the long-term XMM-Newton monitoring program of HD 81809 is analyzed to study its X-ray cycle, to investigate if the latter is related to the chromospheric one, to infer the structure of the corona of HD 81809, and to explore if the ...
Favata, F. +7 more
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X‐ray spectral observations of a solar active region corona [PDF]
Geophysical Research Letters, 1997 We study the X‐ray flux and electron temperature variation of the corona above a solar active region. Electron temperatures are determined using data from the S xv channel of the Bragg crystal spectrometer (BCS) instrument on board the Yohkoh satellite.
openaire +1 more source
The Astrophysical JournalWe explore the capabilities of time-dependent (TD) magnetohydrodynamic (MHD) solar wind simulations with the coupled Wang–Sheeley–Arge (WSA) model of the solar corona and the Grid Agnostic MHD for Extended Research Applications model of the inner ...
Evangelia Samara +4 more
doaj +1 more source
Synthesis of 3-D coronal-solar wind energetic particle acceleration modules [PDF]
, 2014 1. Introduction Acute space radiation hazards pose one of the most serious risks to future human and robotic exploration. Large solar energetic particle (SEP) events are dangerous to astronauts and equipment.
Chandran, Benjamin D.G. +22 more
core +2 more sources
Nonlinear force-free models for the solar corona [PDF]
Astronomy & Astrophysics, 2007 11 pages, 11 ...
Regnier, S., Priest, E. R.
openaire +2 more sources