ABSTRACT Magnetars, the likely sources of fast radio bursts, produce both steady highly relativistic magnetized winds and occasional ejection events. We demonstrate that requirement conservation magnetic flux dominates overall dynamics explosions. This is missed in conventional hydrodynamic models ejections as expanding shell with parametrically added field, well one-dimensional disturbances. M...

The role played by torsion of magnetic vortex line curves or filaments, in the equilibrium state of magnetars is investigated. When the magnetars equilibrium equations are written in terms Frenet-Serret frame it is shown that in regions of the magnetic star where the Frenet torsion is constant it induces an oscillation in the vortex filaments. By solving the magnetar equilibrium equation we sho...

Utilizing results obtained over the past quarter century mainly with Japanese X-ray astronomy satellites, a review is given to some aspects of neutron stars (NSs), with a particular emphasis on the magnetic fields (MFs) of mass-accreting NSs and magnetars. Measurements of electron cyclotron resonance features in binary X-ray pulsars, using the Ginga and Suzaku observatories, clarified that thei...

Bright outbursts from Soft Gamma Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs) are believed to be caused by instabilities in ultramagnetized neutron stars, powered by a decaying magnetic field. It was originally thought that these outbursts were due to reconnection instabilities in the magnetosphere, reached via slow evolution of magnetic footpoints anchored in the crust. Later models con...

The magnetar model and the solid quark star model for anomalous X-ray pulsars/soft gamma-ray repeaters (AXPs/SGRs) are discussed. The pulsar-like stars, whose actions manifest diversely, are speculated to have different ambience and/or inner structure (e.g., mass and strain) in the solid quark star scenario. Relevant arguments made by the author’s group, including a debate on solid cold quark m...