ИСТИНА

Nearby galaxies M31 and M33 contain many interesting evolved stars with nebulae, but for today techical equipment doesn't allow us to receive direct images for objects so far away. In my talk I will present our investigation of structure of the nebula surrounding luminous blue variable star GR290 belonging to M33 galaxy. For the investigation of the nebula spatial structure we came up with a novel method based on using a long-slit spectroscopy of the star with different position angles. As a result we find that GR290 is surrounded by a small elongated HII region which may have been formed on a previous evolutionary phase of the central star. This region extends for ~50 pc to the south; ~30 pc to the north and south-east; 20 pc to the east and north-west; and 10 pc to the west. Nebular forbidden lines [N II] and [O III] form in an unresolved region near the star.