Würzburg 2018 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 14: Astrophysics III - Magnetic Fields, Stellar Clusters, Cosmic Rays and Cosmology

EP 14.1: Talk

Friday, March 23, 2018, 11:00–11:15, BSZ - Pabel HS

Interacting multiple stellar winds in stellar clusters — •Alexander Noack¹, Klaus Scherer¹, Horst Fichtner¹, Jens Kleimann¹, and Kerstin Weis² — ¹Ruhr-Universitaet Bochum, Institut fuer Theoretische Physik IV, Universitaetsstrasse 150, 44780 Bochum — ²Ruhr-Universitaet Bochum, Astronomisches Institut, Universitaetsstrasse 150, 44780 Bochum

Several studies have investigated large-scale cluster winds resulting from an intra-cluster interaction of multiple stellar winds, but as yet no details of the bordering flows inside a given cluster have been provided. The present work aims at exploring the principal structure of the combined flow resulting from the interaction of multiple stellar winds inside stellar clusters. The theory of complex potentials is applied to analytically investigate stagnation points, boundaries between individual outflows, and the hydrodynamic structure of the asymptotic large-scale cluster wind. In a second part, these planar considerations are extended to fully three-dimensional, asymmetric configurations of wind-driving stars. It is found (i) that one can distinguish regions in the large-scale cluster wind that are determined by the individual stellar winds, (ii) that there exist comparatively narrow outflow channels, and (iii) that the large-scale cluster wind asymptotically approaches spherical symmetry at large distances. In summary, the combined flow inside a stellar cluster resulting from the interaction of multiple stellar winds is highly structured.