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The modifcation by diffuse radiation of "cometary tail"\ud formation behind globules

By K.G. Pavlakis, R.J.R. Williams, J.E. Dyson, S.A.E.G. Falle and T.W. Hartquist


We study the evolution of a globule of neutral material immersed in the more tenuous hotter plasma of an H II region surrounding newly born OB stars. The neutral globule is illuminated by the direct ionizing radiation of OB stars, and by diffuse radiation emitted by recombination in the surrounding ionized gas. We perform 2D, time dependent axisymmetric hydrodynamic simulations, and find that, for values of the diffuse field of the order of 10% of the direct field, the evolution of the globule is completely different to its evolution when the diffuse field is neglected

Publisher: EDP Sciences
Year: 2001
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