Turbulence, Waves and Instabilities in the Solar Plasma
Proceedings of the NATO Advanced Research Workshop on Turbulence, Waves, and Instabilities in the Solar Plasma Lillafured, Hungary 16–20 September 2002
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Chapter and Conference Paper
Heating of the Solar Chromosphere by MHD-Waves
We calculate a semi-theoretical model of the lower part of the chromosphere with the aid of the Vernazza et al. (1981) emission coefficients. The equality of the radiative emission coefficient and the absorption ...
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Article
Viscous computations of resonant absorption of MHD waves in flux tubes by fem
A numerical code is presented for computing the stationary state of resonant absorption of MHD waves in cylindrical flux tubes in linear, compressible, and viscous MHD. The full viscosity stress tensor is incl...
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Article
Nonthermal Velocities in the Solar Transition Zone and Corona
Nonthermal velocities are presented for spectral lines covering the temperature range 10 4–10 6 K, measured from high-spectral-resolution data for several solar features observed at the limb by the high resolu...
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Book and Conference Proceedings
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Article
Linear and non-linear MHD wave propagation in steady-state magnetic cylinders
The propagation of linear and non-linear magnetohydrodynamic (MHD) waves in a straight homogeneous cylindrical magnetic flux tube embedded in a homogeneous magnetic environment is investigated. Both the tube a...
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Article
The Effect of Abnormal Granulation on Acoustic Wave Travel Times and Mode Frequencies
Observations indicate that in plage areas (i.e. in active regions outside sunspots) acoustic waves travel faster than in the quiet Sun, leading to shortened travel times and higher p-mode frequencies. Coupled wi...
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Article
Direct Propagation of Photospheric Acoustic p Modes into Nonmagnetic Solar Atmosphere
Solar p modes are one of the dominant types of coherent signals in Doppler velocity in the solar photosphere, with periods showing a power peak at five minutes. The propagation (or leakage) of these p-mode signa...
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Preface: A Topical Issue in Honor of Professor Bernard Roberts
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Present and Future Observing Trends in Atmospheric Magnetoseismology
With modern imaging and spectral instruments observing in the visible, EUV, X-ray, and radio wavelengths, the detection of oscillations in the solar outer atmosphere has become a routine event. These oscillat...
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Chapter
Global Acoustic Resonance in a Stratified Solar Atmosphere
The upward propagation of linear acoustic waves in a gravitationally stratified solar atmosphere is studied. The wave motion is governed by the Klein – Gordon equation, which contains a cutoff frequency introd...
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Article
Global Acoustic Resonance in a Stratified Solar Atmosphere
The upward propagation of linear acoustic waves in a gravitationally stratified solar atmosphere is studied. The wave motion is governed by the Klein – Gordon equation, which contains a cutoff frequency introd...
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Article
Dissipation of Longitudinal Oscillations in Stratified Nonisothermal Hot Coronal Loops
We investigate the dam** of longitudinal (i.e., slow or acoustic) waves in nonisothermal, hot (T≥ 5.0 MK), gravitationally stratified coronal loops. Motivated by SOHO/SUMER and Yohkoh/SXT observations, and by t...
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Article
Open AccessHighly Uniform Epitaxial ZnO Nanorod Arrays for Nanopiezotronics
Highly uniform and c-axis-aligned ZnO nanorod arrays were fabricated in predefined patterns by a low temperature homoepitaxial aqueous chemical method. The nucleation seed patterns were realized in polymer and...
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Foreword
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Heating Diagnostics with MHD Waves
The heating of the solar atmosphere is a fundamental problem of modern solar and astrophysics. A review of the seismological aspects of magnetohydrodynamic (MHD) waves with an emphasis on standing longitudinal...
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Oscillations and Waves in Solar Spicules
Since their discovery, spicules have attracted increased attention as energy/mass bridges between the dense and dynamic photosphere and the tenuous hot solar corona. Mechanical energy of photospheric random an...
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Article
Coronal Seismology by Means of Kink Oscillation Overtones
The detection of overtones of coronal loop kink oscillations has been an important advance in the development of coronal seismology. It has significantly increased the potential of coronal seismology and has t...
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Chapter and Conference Paper
MHD Wave Heating Diagnostics
Analyzing the structure of solar coronal loops is crucial to our understanding of the processes that heat and maintain the coronal plasma at multimillion degree temperatures. The determination of the physical ...
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Chapter and Conference Paper
Waves in the Transition Region
Fundamental questions concerning coronal heating and the origin of the fast solar wind may be answered through greater understanding of fine structures in the lower solar atmosphere. We present results from a ...
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Article
Observational Signatures of Impulsively Heated Coronal Loops: Power-Law Distribution of Energies
It has been established that small scale heating events, known as nanoflares, are important for solar coronal heating if the power-law distribution of their energies has a slope α steeper than −2 (α<−2). Forward ...
