Stellar Outflow: Relative Motions of Nebulae and of Stars
On the basis of arguments presented by Roberts (1972) and of Shu et al. (1972), Minn and Greenberg (1973) argued that the velocity differences between newly formed hot stars and the surrounding interstellar medium are sufficiently different so that typical H II regions should consist of material which is continually being replaced by the ambient medium and which should therefore possess the velocity of the medium rather than that of the star. Obviously, the critical test of this hypothesis will be a comparison of nebular velocities with the velocities of the exciting stars.
KeywordsRadial Velocity Absorption Line Stellar Wind Radiation Pressure Force Large Velocity Difference
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