Abstract Details

Name: Arghyadeep Paul
Affiliation: Indian Institute of Technology Indore
Conference ID: ASI2021_148
Title : Solar wind modelling and its impacts on planetary magnetospheres
Authors and Co-Authors : Arghyadeep Paul, Indian Institute of Technology Indore Sandeep Kumar, Indian Institute of Technology Indore Bhargav Vaidya, Indian Institute of Technology Indore
Abstract Type : Oral
Abstract Category : Sun and the Solar System
Abstract : Planetary magneto-spheres are highly dynamic structures constantly affected by incoming solar or stellar wind. Often, shocks driven by CMEs and high-speed solar wind streams tend to drastically change the overall structure of the magnetosphere. These shocks are also known to produce highly energetic particles that eventually make their way into the magnetosphere. Our goal is to develop a state-of-the-art Space Weather Modelling Framework using hybrid MHD code addressing both, the global dynamical aspects, e.g., background solar wind velocities, solar wind magnetic polarity at Earth’s magnetopause, CME arrival times and its propagation and also smaller scale micro-physical aspects, like magnetic reconnection in the magnetosphere and the associated particle acceleration. In this presentation, I will summarize our initial results of the background solar wind model and its properties along with the simulation results of test particle acceleration in complex magnetic reconnection environments. The initial results from ensemble modelling of solar wind and magnetic field assessment show good agreement with the observed values from ACE and WIND data with low statistical errors. The results from our test particle simulations in magnetic reconnection environments also demonstrates the effect of direct electric field in acceleration of particles in a manner to produce power-law spectrum. Furthermore, we observe a positive feedback on reconnection rate due to small shear flow, however, super-alfvenic shear has a negative feedback on the rate of reconnection.