| Name: | Nitin Vashishtha |
| Affiliation: | Aryabhatta Research Institute of Observational Sciences (ARIES) |
| Conference ID : | ASI2024_1006 |
| Title : | Evolution of CMEs and effect of helicity injection and polar magnetic field strength |
| Authors : | Nitin Vashishtha1, Vaibhav Pant1, Dipankar Banerjee1,2,3, Dana Talpeanu4 |
| Authors Affiliation: | 1 Aryabhatta Research Institute of Observational Sciences, 263001, Nainital, India
2 Indian Institute of Astrophysics, 2nd Block Koramangala, Bangalore 560034, India
3 Center of Excellence in Space Science, IISER Kolkata, Kolkata 741246, India
4 Royal Observatory of Belgium (ROB), Av. Circulaire 3, 1180 Brussels, Belgium |
| Mode of Presentation: | Oral |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | Coronal Mass Ejections (CMEs) are significant drivers of space weather, necessitating a comprehensive understanding of their initiation and evolution in the solar corona. However, limited observations in the inner corona necessitate the use of numerical simulations to probe CME dynamics in this region. In this study, we employ the breakout model to investigate the initiation mechanism of CMEs. Numerical simulations of a CME in a 2.5D domain under the Magnetohydrodynamics framework using MPI-AMRVAC are performed. MPI-AMRVAC is a parallel adaptive mesh refinement framework aimed at solving partial differential equations by a number of different numerical schemes. Our focus lies on examining the evolution of helicity injection, which plays a vital role in CME prediction.
Additionally, we analyse the influence of polar field strength on CME eruptions. Our findings indicate that the rate of increase in total unsigned current helicity can serve as a valuable indicator for CME
eruption. Furthermore, we observe that an increase in polar field strength restricts the occurrence of CME eruptions. |
