Brown J., Cassinelli J.P., Li Q., Kholtygin A., Ignace R. Optically Thick Clumps - Not the Solution to the Wolf-Rayet Wind Momentum Problem? ... 426 , 323-328 (2004) . The hot star wind momentum problem $\eta=\mdot \varv_{\infty}/(L/c) \gg 1$ is revisited, and it is shown that the conventional belief, that it can be solved by a combination of clumping of the wind and multiple scattering of photons, is not self-consistent for optically thick clumps. ...

/0004-6361:20011562 c ESO 2002 Astronomy Astrophysics Bispectrum speckle interferometry of the massive protostellar object S140 IRS 1: Evidence for multiple outflows G. Weigelt1 , Y. Y. Balega2 , T. Preibisch1 , D. Schertl1 , and M. D. Smith 1 2 3 3 Max-Planck-Institut fur Radioastronomie, Auf ... Multiple outflows from S140 IRS 1 the arcs in our image, as we have demonstrated by fitting their morphologies with the predicted cavity shapes of the jet-driven outflow model. ...