Abstract Details
| Name: G. Sindhuja Affiliation: Physical research laboratory, Udaipur solar observatory, udaipur Conference ID: ASI2017_1337 Title : Study of confined and eruptive solar events observed in Ca-K images Authors and Co-Authors : Prof. Nandita Srivastava, Physical research laboratory, Udaipur solar observatory, udaipur Abstract Type : Oral Abstract Category : Sun and the Solar System Abstract : There are two kinds of major energetic phenomena called eruptive and confined events. The former describes flares with associated coronal mass ejections (CMEs), while the latter denotes flares without associated CMEs. One of the method to understand the mechanism of the two types of events is to derive the magnetic-reconnection rates and fluxes from the flare-ribbon evolution of the active region. For this purpose we use the high cadence Ca-K time series data and low-noise 720-second HMI LOS magnetogram data were used to measure the reconnection rate, total reconnection flux. From the past studies it is understood that the surface magnetic flux swept by the flare ribbons relates to a global reconnection rate. Therefore in order to measure the abovesaid parameters, the observables like the newly brightened area and magnetic field of the area inside this, are calculated. This study is conducted both on confined and eruptive events and the difference between the two are studied. The difference is expected since in the eruptive flares, part of the energy is converted into the magnetic reconnection process into acceleration and escape of the CME, whereas in the confined flares all of the magnetic energy released is available for the flare. In this paper, we report the results of the analysis carried for different cases of confined and eruptive flares. |