Abstract

ABOLMASOV, P.  and  MOISEEV, A. V.. Kinematics of the Nebular Complex MH9/10/11 Associated with HoIX X-1. Rev. mex. astron. astrofis [online]. 2008, vol.44, n.2, pp.301-309. ISSN 0185-1101.

We report the results of our observations of the nebular complex MH9/10/11, associated with the ULX HoIX X-1, with a scanning Fabry-Pérot Interferometer. Two regions differing by their kinematics and line ratios may be distinguished, roughly corresponding to the bubble nebula MH9/10 and the fainter HII-region MH11. For MH9/10 we find an expansion rate of 20 to 70 km s^-1 that is different for the approaching and receding parts. MH11 is characterised by a very low velocity dispersion (15 km s^-1) and nearly constant line-of-sight velocities. The properties of MH11 may be explained by photoionization of a gas with hydrogen density of ~ 0.2 cm^-3. The luminosity required for that should be of the order of 10³⁹ erg s^-1. A source of similar power is required to explain the expansion rate of MH9/10. Modelling results also indicate that the oxygen abundance in MH11 is about solar.

Keywords : ISM: bubbles; ISM: individual (MH9/10/11); ISM: kinematics and dynamics; X-rays: individual (HoIX X-1).

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