The properties and classification of IRAS 19111+2555 have so far not been well determined. We collect all the available information and data of this star, and t
Using an axisymmetrical ideal MHD model in spherical coordinates, we present a numerical study of magnetic configurations characterized by a levitating flux rop
On 2002 July 23, a 2B/X4.8 flare was observed in the Hα line spec-tropolarimetrically by the Large Solar Vacuum Telescope of Baikal AstrophysicalObservatory. L
<正>Collinear libration points play an important role in deep space exploration because of their special positions and dynamical characteristics. Since motion a