Oscillatory processes in solar flares

@article{Nakariakov2010OscillatoryPI,
  title={Oscillatory processes in solar flares},
  author={Valery M. Nakariakov and Andrew R. Inglis and Ivan V. Zimovets and Claire Foullon and Erwin Verwichte and Robert Sych and Irina Myagkova},
  journal={Plasma Physics and Controlled Fusion},
  year={2010},
  volume={52},
  pages={124009}
}
Electromagnetic (radio, visible-light, UV, EUV, x-ray and gamma-ray) emission generated by solar and stellar flares often contains pronounced quasi-periodic pulsations (QPPs). Physical mechanisms responsible for the generation of long-period QPP (with periods longer than 1 s) are likely to be associated with MHD processes. The observed modulation depths, periods and anharmonicity of QPP suggest that they can be linked with some kind of MHD auto-oscillations, e.g. an oscillatory regime of… Expand

Figures from this paper

Modelling Quasi-Periodic Pulsations in Solar and Stellar Flares
Solar flare emission is detected in all EM bands and variations in flux density of solar energetic particles. Often the EM radiation generated in solar and stellar flares shows a pronouncedExpand
Multi-mode quasi-periodic pulsations in a solar flare
Context. Quasi-periodic pulsations (QPP) of the electromagnetic radiation emitted in solar and stellar flares are often detected in microwave, white light, X-ray, and gamma-ray bands. MechanismsExpand
Quasi-periodic Pulsation Detected in Lyα Emission During Solar Flares
We investigated the quasi-periodic pulsation (QPP) in Lyman-alpha, X-ray and extreme-ultraviolet (EUV) emissions during two solar flares, i.e., an X-class (SOL2012-01-27T) and a C-classExpand
Quasi-periodic pulsations in solar flares: new clues from the Fermi Gamma-ray Burst Monitor
In the last four decades it has been observed that solar flares show quasi-periodic pulsations (QPPs) from the lowest, i.e. radio, to the highest, i.e. gamma-ray, part of the electromagneticExpand
QUASI-PERIODIC PULSATIONS IN SOLAR AND STELLAR FLARES. REVIEW
This paper provides an overview of the state-of-the-art studies of oscillatory processes in solar and stellar flares, based on modern observational data from ground-based and space-borne instrumentsExpand
QUASI-PERIODIC PULSATIONS IN SOLAR AND STELLAR FLARES. REVIEW
This paper provides an overview of the stateof-the-art studies of oscillatory processes in solar and stellar flares, based on modern observational data from ground-based and space-borne instrumentsExpand
Observation of a quasiperiodic pulsation in hard X-ray, radio and extreme-ultraviolet wavelengths
We present multi-wavelength analysis of a quasi-periodic pulsation (QPP) observed in the hard Xray, radio, and extreme-ultraviolet (EUV) channels during an M1.9 flare occurred on 23–24 SeptemberExpand
A Multi-Period Oscillation in a Stellar Superflare
Flares that are orders of magnitude larger than the most energetic solar flares are routinely observed on Sun-like stars, raising the question of whether the same physical processes are responsibleExpand
Oscillations in stellar superflares
Two different mechanisms may act to induce quasi-periodic pulsations (QPP) in whole-disc observations of stellar flares. One mechanism may be magnetohydromagnetic forces and other processes acting onExpand
COMPARISON OF DAMPED OSCILLATIONS IN SOLAR AND STELLAR X-RAY FLARES
We explore the similarity and difference of the quasi-periodic pulsations (QPPs) observed in the decay phase of solar and stellar flares at X-rays. We identified 42 solar flares with pronounced QPPs,Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 28 REFERENCES
X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations
We report the first observation at high spatial resolution of long-period quasi-periodic pulsations (QPP) of X-ray radiation during solar flares, made possible with the Reuven Ramaty High EnergyExpand
Quasi-Periodic Pulsations in Solar Flares
Quasi-periodic pulsations (QPP) are a common feature of flaring energy releases in the solar atmosphere, observed in all bands, from radio to hard X-ray. In this review we concentrate on QPP with theExpand
Quasi-periodic modulation of solar and stellar flaring emission by magnetohydrodynamic oscillations in a nearby loop
We propose a new model for quasi-periodic modulation of solar and stellar flaring emission. Fast magnetoacoustic oscillations of a non-flaring loop can interact with a nearby flaring active region.Expand
Quasi-periodic pulsations in solar flares
For several decades, quasi-periodic pulsations (QPP) in flares have been a signature feature of solar dynamics. In the last fifteen years, the advent of new observational instruments has led to aExpand
From large-scale loops to the sites of dense flaring loops: preferential conditions for long-period pulsations in solar flares
Long-period quasi-periodic pulsations (QPPs) of solar flares are a class apart from shorter period events. By involving an external resonator, the mechanism they call upon differs from traditionalExpand
Oscillations of hard X-ray flare emission observed by RHESSI : Effects of super-alfvénic beams?
Recent Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) observations of hard X-ray (>25 keV) emission from several flares show damped oscillations with periods of 2-4 minutes and dampingExpand
Relationship between wave processes in sunspots and quasi-periodic pulsations in active region flares
A phenomenological relationship between oscillations in a sunspot and quasi-periodic pulsations (QPP) in flaring energy releases at an active region (AR) above the sunspot is established. TheExpand
QUASI-PERIODIC PULSATIONS IN THE GAMMA-RAY EMISSION OF A SOLAR FLARE
Quasi-periodic pulsations (QPPs) of gamma-ray emission with a period of about 40 s are found in a single loop X-class solar flare on 2005 January 1 at photon energies up to 2-6 MeV with the SOlarExpand
Solar flare radio pulsations as a signature of dynamic magnetic reconnection
Decimetric radio observations of the impulsive solar flare on October 5, 1992, 09:25 UT show a long series of quasi-periodic pulsations deeply modulating a continuum in the 0.6-2 GHz range that isExpand
Imaging Observations of Quasi-Periodic Pulsatory Nonthermal Emission in Two-Ribbon Solar Flares
Using RHESSI and some auxiliary observations we examine possible connections between the spatial and temporal structure of nonthermal hard X-ray (HXR) emission sources from the two-ribbon flares ofExpand
...
1
2
3
...