| Abstract : | Coronal Mass Ejections (CMEs) are the central component of solar eruptions. And solar wind (SW) streams, acting as a background, govern their propagation in the heliosphere and drive geomagnetic storm activities. Therefore, adequate study and accurate forecasting are necessary to understand and mitigate its effect. Here, we present the implementation and results of a space weather forecasting-targeted inner heliospheric model, the “Space Weather Adaptive SimulaTion framework” (SWASTi). In particular, the SW and CME modules will be demonstrated. The SW module is based on a two-domain approach: a semi-empirical coronal domain and an MHD inner-heliospheric domain. The GONG/HMI magnetogram is used as observational input data, and SW plasma properties are computed in the heliosphere using the PLUTO code. The cone or flux rope CME is then injected into the ambient SW by using the CME module. In addition to a detailed modeling methodology, the validation results will be shown by comparing the simulation results with in-situ measurements at multiple vantage points. Furthermore, the results of a parametric study of the interaction of CME with the ambient SW and stream/corotating interaction regions (SIRs/CIRs) will be demonstrated. It will be shown that SIR/CIR have the potential to significantly alter the CME properties during their propagation. Alteration may include deformation in flux rope, distortion of CME's front convexity, deflection in azimuthal and meridional directions, and change in kinematics. The effects of these changes are manifested at the Earth's location in the form of a modified arrival time, CME properties, and duration. Conclusively, we will illustrate how SWASTi will complement the in-situ payloads, APSEX and MAG, of Aditya-L1. |
