München 2019 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 6: Astrophysics I: Astrospheres

EP 6.1: Hauptvortrag

Donnerstag, 21. März 2019, 12:00–12:30, HS 9

Interactions of multiple stellar winds inside stellar clusters — •Alexander Noack¹, Klaus Scherer¹, Jens Kleimann¹, Horst Fichtner¹, and Kerstin Weis² — ¹Institut für Theoretische Physik IV, Ruhr-Universität Bochum, 44780 Bochum, Germany — ²Astronomisches Institut, Ruhr-Universität Bochum, 44780 Bochum, Germany

This talk deals with the interaction of stellar winds inside stellar clusters. We have investigated the principal flow structure of combined multiple stellar winds, including stagnation points and boundary regions of asymmetrical cluster configurations using hydrodynamical methods. We have, first, applied the theory of complex potentials to analyze planar cases analytically. Second, this model was expanded to fully three-dimensional, asymmetric configurations with the aid of numerics.

We found (i) that one can distinguish regions in the large-scale cluster wind that are determined by the individual stellar winds, (ii) that there are comparatively narrow outflow channels, and (iii) that the large-scale cluster wind asymptotically approaches spherical symmetry at large distances. Consequently, one must conclude that the combined flow inside a stellar cluster resulting from the interaction of multiple stellar winds is highly structured.

More information can be found in the related paper: K. Scherer, A. Noack, J. Kleimann, H. Fichtner and K. Weis, 2018, A&A, 616, A115.