Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Solar dynamics observatory"”.
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Coexistence of Slow Magnetoacoustic Waves and Thermal Limit Cycles in a Coronal Bright Point
… clusters of small-scale loops ubiquitous on the solar surface observed in extreme ultraviolet (EUV) and X-ray wavelengths. We analyse characteristics of oscillations in EUV emissions observed by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO) that are …
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A comprehensive study of evolution of photospheric magnetic field and flows associated with solar eruptions
… been recognized as an important element of the solar flare process. Recent theoretical work has shown that such a change would imply Lorentz force perturbations acting on both the outer solar atmosphere and the solar surface. This research uses vector magnetograms obtained with the Helioseismic …
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The Impact of Sunspot Rotation on Solar Flares
Solar flares are one mechanism to release stored magnetic energy in the Sun’s atmosphere. This thesis aims to determine whether sunspot rotation can inject the energy required for solar flares into the corona. This thesis investigates the relationship between sunspot rotation and solar flares, and …
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Magnetic reconnection in small and large scales on the sun
Almost all solar activities observed are related to the solar magnetic field, especially the topological restructuring of magnetic fields, the so-called magnetic reconnection in solar physics. They are occurring at different scales related to various phenomena, during minimum or maximum of the …
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Automated system design for the efficient processing of solar satellite images. Developing novel techniques and software platform for the robust feature detection and the creation of 3D anaglyphs and super-resolution images for solar satellite images.
… is a continuing increase in the rate at which solar data is becoming available for study which presents both opportunities and challenges. Two satellites recently launched to observe the sun are STEREO (Solar TErrestrial RElations Observatory), providing simultaneous views of the SUN from two …
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Automated system design for the efficient processing of solar satellite images. Developing novel techniques and software platform for the robust feature detection and the creation of 3D anaglyphs and super-resolution images for solar satellite images.
… is a continuing increase in the rate at which solar data is becoming available for study which presents both opportunities and challenges. Two satellites recently launched to observe the sun are STEREO (Solar TErrestrial RElations Observatory), providing simultaneous views of the SUN from two …
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Comparison and Investigation of Solar Spectral Irradiance with Solar Aspect Monitor
… thermosphere is derived. The uniquely stable solar activity during 2010 allows the local time variation of NO to be observed with limited influence of solar variability. The comparison with a 1D model shows good agreement at altitude above 120 km, suggesting that most of the local time …
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Detection of Solar Prominences using Automated Methods and Analysis of their Dynamic Pre-Eruptive Behaviour
Solar prominences, or filaments when viewed on the disk, are cool, dense plasma structures in the solar corona. Prominences are of great interest for space weather and can be seen as a natural laboratory to explore concepts of plasma physics and magnetism. The eruption of prominences can have a …
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Understanding the energy balance of TR structures observed by IRIS in non-equilibrium emission
… of the Atmospheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO). The set of observables used to characterize the brightenings consists of diagnostics of temperature, density, line broadening, and Doppler-shift on a pixel-by-pixel basis. The characterization scheme is extended by …
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Atmospheric responses to flare generated sunquakes
… Å and H-α 6563 Å passbands from the Swedish 1-m Solar Telescope (SST) were used in combination with space-based observations from the Heliosesimic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO). Both instruments observed wavefronts emanating from the X9.3 solar flare of …