| Name: Sanjay Kumar |
| Affiliation: Department of Physics, Patna University, Patna |
| Conference ID: ASI2026_978 |
| Title: A Data Constrained MHD Simulation of Magnetic Reconnection at Hyperbolic Flux Tube and Quasi-Separatrix Layer |
| Abstract Type: Poster |
| Abstract Category: Sun, Solar System, Exoplanets, and Astrobiology |
| Author(s) and Co-Author(s) with Affiliation: Sanjay Kumar(Department of Physics, Patna-800005, Indiaa University, Patna), Pawan Kumar(Department of Physics, Patna-800005, India University, Patna), Sadashiv(Department of Physics, Patna University, Patna-800005, India), Sushree S. Nayak(Department de F´ısica, Universitat de les illes Balears, E-07122, Palma de Mallorca, Spain), Simrat Kaur(Udaipur Solar Observatory, Udaipur-313001, India), Ramit Bhattacharyya(Udaipur Solar Observatory, Udaipur-313001) |
| Abstract: In this work, we identify the magnetic reconnections at the hyperbolic flux tube (HFT), aided by slipping reconnection at quasi-separatrix layers (QSLs), which are pivotal to the occurrence of a confined M2.1 class flare in NOAA active region 12268. The magnetic field topology before the flare's onset is obtained through a non-force-free-field extrapolation scheme that accommodates a non-zero Lorentz force. A key aspect is the presence of an HFT in the computational domain above the flaring region, along with two QSLs at the lower boundary. To simulate the dynamics of the active region, we conduct a data-constrained magnetohydrodynamics (MHD) simulation initiated by the extrapolated field. The dynamics captured in the simulation document the formation of a current sheet within the HFT configuration, leading to magnetic reconnection at the HFT. Additionally, we observe the slipping motion of the footpoints of the magnetic field lines in the QSLs at the bottom boundary, which indicates the occurrence of slipping reconnection in the QSLs. Importantly, the magnetic reconnections at the HFT and the QSLs are suggested to contribute to the development of the intricate flare brightenings and the flare ribbons. |
