How flux feeding causes eruptions of solar magnetic flux ropes with the hyperbolic flux tube configuration

Coronal magnetic flux ropes are generally considered to be the core structure of large-scale solar eruptions. Recent observations found that eruptions could initiated by a sequence "flux feeding," during which chromospheric fibrils rise upward from below, and merge with pre-existing prominence. Further theoretical study has confirmed feeding mechanism is efficient in causing eruption wrapped bald patch separatrix surfaces. But it unclear how influences coronal hyperbolic tubes (HFT), whether able cause flux-rope eruption. In this paper, we use 2.5-dimensional magnetohydrodynamic model simulate processes HFT configurations. It injects axial into rope, whereas poloidal rope reduced after feeding. Flux erupt, provided injected large enough so critical reached. Otherwise, system evolves stable equilibrium state feeding, might even farther away onset eruption, indicating stabilize configuration circumstance.