Formation of bipolar flow by the stellar wind embedded in molecular disk

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Early Stars, Molecular Clouds, Shock Fronts, Stellar Envelopes, Stellar Winds, Bipolarity, Density Distribution, Interstellar Gas, Rotating Disks, Stellar Structure

Scientific paper

The interaction of the isotropic stellar wind with the rotating isothermal cloud surrounding the young star is investigated. The density distribution of the cloud is taken as that for the equilibrium state of the rotating isothermal cloud modified by adding the rarefied interstellar gas in the polar region. The development of the shock envelope and the structure of the shell induced by the stellar wind are obtained. It is shown that the envelope of the shock front elongates and opens to the polar direction with half opening angle of about 20 degrees resulting the bipolar flow which is able to reproduce well the observed properties for the outflow in the bipolar sources.

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