ИСТИНА

We analyzed the ionized gas kinematics in the vicinity of the ULX HoII X-1 located in the Holmberg II galaxy. The observations of this object with a scanning Fabry-Perot interferometer in the Hα, [SII] and [OIII] emission lines were carried out at the 6-m telescope of SAO RAS. Decomposition of the line profiles allows us to identify the blueshifted ‘arc’ around the ULX observed in the line-of-sight velocity field. The shape of this arc is in a good agreement with the computed model of a bow shock caused by the ULX movement from the nearby young star cluster. It was previously proposed that ULXs are escaping from the young star clusters. This idea based on the fact that ULXs are often observed near, but outside of the young star clusters. We found the first kinematic evidence of this hypothesis.