Abstract Details
| Name: INDUJA M S Affiliation: RADIO ASTRONOMY CENTRE, NCRA-TIFR, OOTY Conference ID: ASI2015_837 Title : Steadily Declining Activity During Solar Cycles 22-24 and its Consequences on the Propagation of Coronal Mass Ejections in the Inner Heliosphere. Authors and Co-Authors : P. K. Manoharan Radio Astronomy Centre NCRA-TIFR Ooty Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : The activity of the current solar cycle in its maximum phase is low compared to the corresponding maxima of cycles 22 and 23. Interplanetary scintillation (IPS) observations made with the Ooty Radio Telescope at 326.5 MHz reveal a steady decline of solarwind speed and density turbulence between cycles 22 to 24. In this study, in association with the above steady decline of activity, we consider initiation and propagation characteristics of coronal mass ejections (CMEs). We analyse ~30 CME events at three representative phases of solar cycles 22 to 24. The near sun dynamics of these events have been obtained from white-light images. In the midway between sun and earth, the size and speed of CMEs have been estimated from Ooty IPS measurements. This study discusses the rate of expansion/propagation of the CMEs as a function of solar cycle. |