Magnetic Field Extrapolation in Active Region Well Comparable to Observations in Multiple Layers

Abstract Magnetic field extrapolation is a fundamental tool to reconstruct the three-dimensional magnetic above solar photosphere. However, prevalently used force-free model might not be applicable in lower atmosphere with non-negligible plasma β , where crucial process of flux rope formation and evolution could happen. In this work, we perform active region 12158, based on recently developed magnetohydrostatic (MHS) method that takes forces into account. By comparing results those from methods, find overall properties, which are characterized by free energy helicity, roughly same. The major differences lie configuration twist number (MFR). Unlike previous works either obtained sheared arcades or one coherent rope, MHS derives two sets MFR, highly twisted slightly coupled. Specifically, result present work more comparable high-resolution observations chromosphere, through transition corona, such as filament fibrils, pre-eruptive braiding characteristics, eruptive double-J-shaped hot channel. Overall, our shows newly promising reproduce fine structures can well match at multiple layers, future data-driven simulation will benefit understanding critical precise dynamics before eruption.