A Study of Oscillations in Solar Active Regions
Ram Ajor Maurya
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A Study of Oscillations in Solar Active Regions

Exploring the Connection between Interior and Atmosphere of Active Regions

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Solar active regions (ARs) are three-dimensional magnetic structures extending from deep sub-photosphere to coronal heights. These ARs are responsible for producing most of the energetic transients, such as flares and CMEs. Energetic transients are expected to excite p-mode oscillations in ARs by imparting mechanical impulse associated with their thermal expansion on the photosphere. Flare productive ARs may have distinctly different sub-photospheric properties compared to dormant ARs. We have determined the characteristic properties of local oscillation modes by applying the local helioseismi...