VLBI MEASUREMENT FOR THE DYNAMICAL STRUCTURE OF THE MASERING REGION

Hydroxyl maser emissions associated with a star formation region NGC6334 Fin right and left polarizations at the 1665 and 1667 MHz transitions are observed with VLBI MKIIIrecording system. It is found that in the region, the strong Hydroxyl maser emissions come from an area of a scale 5×10¹⁵cm. The majority of Hydroxyl maser features are projected onto the core of cometary HIIregion. The velocity gradiant 6-10 km/s/arcsec is found in the velocity-position plot. This suggests that there may be a rotating disk in which a young OBstar is formed with mass -25M_⊙.