Context. Longitudinal oscillations in prominences are common phenomena on the Sun. These can be used to infer geometry and intensity of filament magnetic field. Previous theoretical studies longitudinal made two simplifying assumptions: uniform gravity semicircular dips supporting flux tubes. However, is not realistic semicircular. Aims. Our aim understand effects including nonuniform solar exp...

SOLAR ACTIVITY DETECTION AND PREDICTION USING IMAGE PROCESSING AND MACHINE LEARNING TECHNIQUES by Gang Fu The objective of the research in this dissertation is to develop the methods for automatic detection and prediction of solar activities, including prominence eruptions, emerging flux regions and solar flares. Image processing and machine learning techniques are applied in this study. These ...

To investigate the hypothesis that prominences form by magnetic reconnection between initially distinct flux systems in the solar corona, we simulate coronal magnetic field evolution when two flux systems are driven together by boundary motions. In particular, we focus on configurations similar to those in the quiescent prominence formation model of Martens and Zwaan. We find that: reconnection...

A new algorithm for automatic detection of prominences on the solar limb in 304 Å EUV images is presented, and results of its application to SOHO/EIT data discussed. The detection is based on the method of moments combined with a classifier analysis aimed at discriminating between limb prominences, active regions, and the quiet corona. This classifier analysis is based on a Support Vector Machi...

Prominence oscillations are one of interesting phenomena in the solar atmosphere, which can be utilized to infer embedded magnetic field magnitude. We present here transverse two different prominences located at East limb on 2011 February 11 using multi-wavebands data Atmospheric Imaging Assembly (AIA) on-board Solar Dynamics Observatory (SDO) satellite. A prominence eruption was observed towar...

Context. The triggering process for prominence instability and consequent coronal mass ejections (CMEs) is not fully understood. Prominences are maintained by the Lorentz force against gravity; therefore, reduction of due to rain may cause change balance hence destabilisation structures. Aims. We aim study observational evidence influence on stability subsequent eruption CMEs. Methods. used sim...