Modelling of H II region emission with bubble-like structure inside

1Koshmak, IO, 1Melekh, BY
1Ivan Franko National University of Lviv, Lviv, Ukraine
Kinemat. fiz. nebesnyh tel (Online) 2013, 29(6):3-19
Start Page: Structure and Dynamics of the Galaxy
Language: Ukrainian

The influence of bubbles on the ionization spectrum shape as well as on the emission line formation is investigated using multicomponent photoionization modelling. The first and second inner components of such modelling correspond to the hypersonic stellar wind zone and to the zone of shocked stellar wind from the central starburst region, respectively. The gas density distribution in these components is derived from bubble structure obtained from equation system of continuity and energy transfer including heat conductivity. The third component is a thin shell of high density gas formed by wind shock from the surrounding gas. The fourth component is a typical H II region. Input spectra of the ionizing radiation are obtained from the starburst evolutional models. The evolutional grid of the multicomponent photoionization models with different bubble parameters is calculated. The influenсe of bubble presence inside the H II region on the continuum spectrum shape changing as well as on the formation of radiation fluxes in important emission lines is analysed.

Keywords: bubble-like structures, simulation, stellar wind

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