Results 91 to 100 of about 14,186 (205)
Modelling continuum intensity perturbations caused by solar acoustic oscillations
, 2021 Context. Helioseismology is the study of the Sun’s interior using observations of oscillations at the surface. It suffers from systematic errors, for instance a center-to-limb error in travel-time measurements.
Gizon, Laurent +8 more
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Helioseismic Properties of Dynamo Waves in the Variation of Solar Differential Rotation
The Astrophysical JournalSolar differential rotation exhibits a prominent feature: its cyclic variations over the solar cycle, referred to as zonal flows or torsional oscillations, are observed throughout the convection zone.
Krishnendu Mandal +2 more
doaj +1 more source
Investigating Alfvénic wave propagation in coronal open-field regions
, 2015 The physical mechanisms behind accelerating solar and stellar winds are a long-standing astrophysical mystery, although recent breakthroughs have come from models invoking the turbulent dissipation of Alfvén waves.
Morton, Richard +2 more
core +1 more source
The Astrophysical JournalWe report detection of quasi-periodic pulsations in extreme-ultraviolet (EUV) emissions during the peak phase of an X-class solar flare. Temporal variation of EUV intensity in 171 Å and 335 Å channels of SDO/AIA were analyzed using wavelet transform ...
Sachin Rajkapoor Kanaujiya +2 more
doaj +1 more source
Extreme-ultraviolet Wave and Quasiperiodic Pulsations during an Eruptive M-class Flare
The Astrophysical JournalIn this paper, we report multiwavelength and multipoint observations of the prominence eruption originating from active region 11163, which generated an M3.5 class flare and a coronal mass ejection (CME) on 2011 February 24.
Shuyue Li +5 more
doaj +1 more source
Solar oscillations as a guide to solar structure
The Astrophysical Journal, 1976 The theoretical spectrum of frequencies for the radial oscillations of a solar model is shown to depend on the treatment of convection near the model surface. For example, the period of the fundamental radial mode can vary from 48 minutes to 66 minutes, depending on the treatment.
openaire +1 more source
Wave Period Variability in a Quiescent Solar Prominence
The Astrophysical JournalOn 2022 September 26, we observed a quiescent solar prominence with H α imaging spectroscopy using the Solar Dynamics Doppler Imager (SDDI) on board the Solar Magnetic Activity Research Telescope (SMART).
A. Wiśniewska +6 more
doaj +1 more source
From kink instability to magnetic reconnection to oscillations in solar flares
Fundamental Plasma PhysicsWe show how some different fundamental plasma processes - the ideal kink instability, magnetic reconnection and magnetohydrodynamic oscillations - can be causally linked.
Philippa K. Browning +3 more
doaj +1 more source
Living Reviews in Solar Physics, 2018 Prominences are intriguing, but poorly understood, magnetic structures of the solar corona. The dynamics of solar prominences has been the subject of a large number of studies, and of particular interest is the study of prominence oscillations.
Iñigo Arregui +2 more
doaj +1 more source
, 2015 The Sun rings like a bell. The central frequency of the sound is far below human hearing, just 0.003 Hz. The sounds you hear as part of this work have been increased in speed by 100,000 times bringing the sound up to 300 Hz and into the range of our ...
Physics and Astronomy +1 more
core +2 more sources